Questions tagged [armor-class]

For questions about Armor Class (AC), the mechanical abstraction of how difficult it is to hit and cause damage to an opponent in D&D and related RPGs.

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Is this unarmored defense option balanced

One of the conceits of a campaign I am running is that in some areas classes like the fighter or paladin would not rely on heavy armor. Is the following option balanced? Unarmored Warrior ...
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3 votes
2 answers
300 views

As a Fairy Rune Knight, what are my options for being strength based and still having a good armor class?

The Fairy race, first printed in the adventure Supplement Wild Beyond the Witchlight, is a flying race that has the following restriction on the use of its flying speed: Because of your wings, you ...
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5 votes
1 answer
583 views

My player character is wearing 2 types of armor, how do I decide which calculation is the one to use?

I've read the other questions about stacking AC which I know can't be done according to the rules, but then the rules also say that you can wear chain shirt under leather, so it contradicts itself ...
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5 votes
2 answers
217 views

I want to know how my 5e homebrew compares to RAW, but don't really know where to begin [closed]

Alright, strap in because I've got an overly complex homebrew that I want to see how it compares to RAW. The problem is that I don't really know where to start this comparison or how to make it easier ...
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8 votes
1 answer
4k views

In the first "Eye of the Beholder" game, does lower AC mean the target is harder to hit?

I am not sure whether character adjustment in the first Eye of the Beholder game works accurately. I see that AC depends only on DEX: DEX AC (Human Male) 3 14 4 13 5 12 6 11 7–14 10 15 9 16 8 ...
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  • 191
2 votes
2 answers
372 views

Best option after attuning to Shield of Missile Attraction

Let's say the party tank has picked up, and attuned to, a Shield of Missile Attraction, which states the following: While holding this shield, you have resistance to damage from ranged weapon attacks....
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9 votes
5 answers
3k views

Is this homebrew magic item that lets you add your Wisdom modifier to your AC (while attuned) balanced as a rare magic item?

I recently had an idea for a new item in 5e. This item is a cloak that lets you add your Wisdom modifier to your AC (requires attunement). I was thinking of making it a rare magic item, and I was ...
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15 votes
2 answers
2k views

Is it true that Reckless Attack renders AC boosts less effective?

I saw someone arguing recently that A) Barbarians should always RA. and B) Assuming A) is true ... then it's a waste of time for a Barbarian to try to boost their AC. I assume that the case for B) is ...
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9 votes
2 answers
1k views

How does the Armor of Agathys spell interact with characters in heavier armor?

New DM here. I have a player running an Oath of Conquest paladin. He makes a pretty convincing argument that as he increases his armor class, he becomes harder to hit, and Armor of Agathys triggers ...
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  • 209
5 votes
1 answer
304 views

Are there any ways for a martial class to reduce an enemy's armor class?

I recently had a player express interest in playing a martial character (d&d 5e) who could somehow reduce an enemy's AC. My understanding is that the flavor they were going for is based on things ...
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6 votes
1 answer
1k views

Can you stack AC bonuses with an Artificer's Infusions?

Can you stack AC bonuses with an Artificer's Infusions? I get that you can't use the same Infusion on multiple items. However... does the Enhance Defense Infusion and Repulsion Shield Infusion stack ...
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6 votes
3 answers
1k views

Does magical armor enhancement bonus increase the armor’s maximum dexterity?

Do magical armor enhancement bonuses increase the maximum DEX mod allowed for an armor? If so, awesome! If not, are there other ways to optimize AC through a DEX driven character?
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19 votes
5 answers
2k views

Spread out AC or consolidate?

Imagine a Party with 4 characters. Each one has different AC: 14 AC/48 HP (squishy caster) 15 AC/50 HP 16 AC/50 HP 17 AC/54 HP (the tank) The Party picks up a Ring of Protection +1. Who "should&...
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  • 1,817
3 votes
0 answers
76 views

How to calculate constitution based armor class for a Loxodon barbarian in 5e? [duplicate]

Loxodons have natural armor that is calculated using "12+con_mod" Barbarians have unarmored defence calculated using "10+dex_mod+con_mod" One of my players wants to be a Loxodon ...
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5 votes
1 answer
232 views

Apply force armor from mage armor/inertial armor/etc. against touch attacks?

I want to cast a spell or manifest a power that provides a +4-or-greater bonus to AC that lasts hours/level or longer, and have it apply to touch attacks. The mage armor, luminous armor, and greater ...
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17 votes
5 answers
3k views

How can I reliably increase our giant ape's AC to 16 (or better)?

A tactical problem to solve based on last night's session Tactical Situation Wizard polymorphs warlock (8th level) into a Giant Ape. (Did T-Rex last time, looking for variety and higher INT (7 vs 2); ...
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27 votes
9 answers
7k views

Can you lower your AC on purpose?

For roleplaying reasons I would like to make a NPC appear weaker than it actually is. When the players first fight it, it should seem to have a very low AC and miss many attacks. Is this possible in ...
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10 votes
1 answer
702 views

Summon spells and AC

The summon spells introduced in Tasha's Cauldron of Everything include an armor class calculation, but it's unclear from the description if the AC should include the dexterity modifier or not. For ...
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7 votes
1 answer
484 views

Are there any rules or guidelines that demonstrate how many hit points an increase in AC is worth?

I am trying to determine if I should increase the base hit points, or the starting AC for my monsters to make them a bit more challenging for my players due to the size of the party (7-8 players). Is ...
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  • 6,054
5 votes
1 answer
374 views

Does wearing magic items with armor affect AC negatively?

If I’m wearing a set of full plate armor and I replace the gauntlets with gauntlets of ogre strength do I lose the AC provided by the full plate as I’m no longer wearing a full set of full plate ...
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3 votes
1 answer
158 views

What is the chance of being hit?

As a companion to this question, what is the expected chance of being hit by an average monster of your level?
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23 votes
1 answer
985 views

Is Armor Class a difficulty class (DC)?

Frightened talks only about DCs: [...] You take a status penalty equal to this value to all your checks and DCs [...] Compare it to Clumsy: [...] You take a status penalty equal to the condition ...
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6 votes
2 answers
908 views

Does losing Dex to AC also apply to CMD?

Relevant rules: CMD: ...Any penalties to a creature's AC also apply to its CMD. A flat-footed creature does not add its Dexterity bonus to its CMD... blind: ...The creature cannot see. It takes a –...
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6 votes
3 answers
3k views

Natural 20 vs higher AC

If a character or creature has an AC that with all bonuses requires a 20 to hit does that mean that every hit is a crit? Or alternately the creatures AC is so high that with all bonuses no hit would ...
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4 votes
0 answers
246 views

How does defense work? [closed]

I'm new to D&D and I want to make a new character, he is a warlock with 11 hp and 13 armor class. What should I do when I get attacked? Damage - defense? I don't have the books, I'm using D&D ...
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47 votes
8 answers
11k views

How do I explain to an AD&D player that items that increase Armor Class in D&D 5e are overpowered?

Context: I have recently started a campaign with a new player that comes from an AD&D background. He wishes to convert and import his character to the campaign. We did this once, and I helped him ...
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0 votes
1 answer
782 views

What is the AC of a sprite familiar (from the Find Familiar spell) if it is dismissed to a pocket dimension and then caused to reappear as an action?

The most recent Sage Advice Compendium erratas the find familiar spell so that familiars are now stripped naked when dismissed to a pocket dimension. The Pact of the Chain warlock can summon a Sprite ...
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-7 votes
2 answers
2k views

Can a character wear both chain mail and leather armor to get a higher AC?

Background I am reading the Goblin Slayer light novel. In it the main character wears leather armor over plate or chain to both stack his AC and to confuse his (not very intelligent) enemies into ...
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4 votes
4 answers
1k views

What can a dragon use to increase their armour class? [closed]

It is hard to survive as dragon - and yet they do. Despite being known for their nasty claws+bite, fear radiance and breath weapon - thus becoming a high priority target for nearly any ranged attack - ...
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5 votes
1 answer
642 views

Can you stack dodge modifiers?

You can choose the Combat expertise feat and the Dodge feat. Both of them grant dodge modifiers to Armor Class. Are their Armor Class modifiers stacked?
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6 votes
4 answers
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How to open a door with AC 15, 18 hit points?

I'm learning to play D&D and I'm following the Frozen Sick adventure from D&D Beyond. At some point, the players need to open a door with "AC 15, 18 hit points". I think AC means ...
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11 votes
2 answers
2k views

What is the AC equivalent of mirror image?

It is suggested (by the DMG) to account for defensive options by assuming increased AC, e.g. +2 AC for magic resistance. I would like to give some of my monsters the spell mirror image as part of a ...
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7 votes
1 answer
2k views

Does the +1 AC bonus from the Warforged racial trait Integrated Protection and the Forge Domain cleric's Blessings of the Forge stack?

The Warforged race (from Eberron: Rising from the Last War, p. 36) has a racial feature called Integrated Protection, which among other things, grants the following: You gain a +1 bonus to Armor ...
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3 votes
1 answer
105 views

Against which AC do you check on the strikes of the Tiger Claw discipline?

As the title says. If, let's say, I catch my opponent flat-footed and use Claw at the Moon, do I check against flat-footed AC or complete AC? Claw at the Moon: As part of this maneuver, you attempt a ...
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  • 1,077
4 votes
1 answer
426 views

How to convert armour class from Pathfinder 1 to D&D 5?

My sandbox game uses some material from Pathfinder (and D&D 3 and 3.5). I run games there using D&D 5 (among other rules systems). How do I convert the armour class of a creature (especially ...
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  • 9,717
7 votes
1 answer
237 views

Which hybrid classes give alternative ways to calculate AC?

In D&D 4e some hybrid classes provide alternative ways to calculate AC. I know about Hybrid Runepriests (Serene Blade) using Wisdom. What other class-ability combinations are there?
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0 votes
3 answers
104 views

What is the AC of a Wall of Bone?

The spell Wall of Bone details a number of statistics about the sections of wall created, including HP, but the description says nothing about AC. It is based on Wall of Stone but that spell does not ...
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3 votes
1 answer
1k views

Enhancement bonuses to armour and natural armour stacking

The Ironskin spell states as follows (emphasis mine): You gain a +4 enhancement bonus to your existing natural armor bonus (if you do not have a natural armor bonus, you are considered to have an ...
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4 votes
1 answer
458 views

Can you wield the Staff of Defense and a shield, and have their AC bonuses stack with the Mage Armor spell?

The staff of defense from the Lost Mine of Phandelver Starter Set campaign (p. 53) is a magic staff that grants +1 to AC when attuned. As a magic staff, it also functions as a quarterstaff, which has ...
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5 votes
1 answer
261 views

Does armor class protect against damage from falling objects?

Does armor class protect against damage from falling objects? Let’s say we have average Munchkin McGee. Now, he boosts his AC to Celestia and back, then his damage reduction to the Abyss and back. I ...
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10 votes
2 answers
2k views

What is the highest possible unarmored AC?

What is the highest possible AC a character can get by themselves with no armor and no shield? Constraints: Must be obtainable with a single character, by themselves, with no help from any other ...
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0 votes
0 answers
77 views

Possibility of DND 5e AC buld-up [duplicate]

I read in the DND 5e player's handbook about AC and I'm confused if my build is ok or not. I'm trying to create lvl 4 character with a lot of AC with a light armor. So here it is: A Tabaxi, Fighter ...
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2 votes
3 answers
2k views

AC calculation with a Defense Fighter + Shield + Defensive duelist

I try to create a lvl 4 character with a lot of AC. I'm not sure if it's ''legal'' So here it is: Studded leather armor : 12 AC Dex mod : +3 Shield + 2 AC Fighter Defensive style : +1 Ac Feat ...
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5 votes
1 answer
1k views

Do Tiny animals get an AC bonus?

In Pathfinder 2e, do tiny animals get a circumstance bonus to AC? Would a Tiny familiar get that same bonus?
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  • 51
9 votes
2 answers
3k views

Is there an official source for the properties of stone?

The issue comes up mainly in relation to the spell wall of stone, which states that: A nonmagical wall of solid stone springs into existence at a point you choose within range. [...] The wall is ...
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4 votes
2 answers
272 views

What is the AC of a Human with 16 dex combined with the spell Armor?

The Spell Armor (Unearthed Arcana p.51-52) states: The caster creates ,a magical field of force which serves as if it were leather armor (AC 8). If the spell is cast upon a person already armored, it ...
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15 votes
3 answers
3k views

How does AC scale with character level?

In D&D 3.5, I know that base attack bonus scales with level. How does AC increase over levels to meet it? I know saves do, so there should be some kind of AC thing? Is it done more with HP, or is ...
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  • 688
17 votes
2 answers
4k views

What is the AC of a Warforged Druid when Wild Shaped?

When a Warforged Druid uses Wild Shape, how is its Armor Class determined? Will the AC be based on the Warforged's Integrated Protection trait (E:RftLW, p. 36; WGtE, p. 70), or the animal's natural ...
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4 votes
1 answer
96 views

Dervish of Dawn (Fighter) reducing higher charge AC penalties

Burst of Speed (Ex) At 3rd level, a dervish takes only a –1 penalty to her AC after charging. At 7th level, the dervish can charge with no penalty. This ability replaces Armor Training 1. - ...
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11 votes
3 answers
5k views

What are the ramifications of changing Armor Class to be Constitution-based instead of Dexterity-based?

It's never made much sense to me that your Armor Class is based on your Dexterity modifier, which carries the implication that you're harder to hit because you're somehow nimbly moving out of the way ...
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