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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4
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2answers
664 views

Armor of Agathys on a Conquest Paladin

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 ...
5
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1answer
159 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 ...
6
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1answer
814 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 ...
6
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3answers
729 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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5answers
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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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0answers
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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 ...
4
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1answer
137 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 ...
16
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5answers
2k 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); ...
27
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9answers
6k 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 ...
10
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1answer
634 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 ...
7
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1answer
456 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 ...
5
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1answer
335 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 ...
11
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2answers
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Can Tortles receive the non-AC benefits from magic armor?

The Tortle's Natural Armor trait says: Due to your shell and the shape of your body, you are ill-suited to wearing armor. Your shell provides ample protection, however; it gives you a base AC of 17 (...
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1answer
146 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?
22
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1answer
866 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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2answers
628 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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3answers
2k 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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0answers
196 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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8answers
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 ...
0
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1answer
668 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 ...
-6
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1answer
1k 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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4answers
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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1answer
540 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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4answers
4k views

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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2answers
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 ...
7
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1answer
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 ...
3
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1answer
101 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 ...
4
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1answer
343 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 ...
7
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1answer
215 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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3answers
92 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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1answer
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 ...
4
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1answer
299 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 ...
5
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1answer
242 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 ...
6
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2answers
1k views

What is the highest possible unarmored AC?

What is the highest possible AC a character can get by themselves with no armor or a shield? Constraints: Must be obtainable with a single character, by themselves, with no help from any other ...
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0answers
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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3answers
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 ...
5
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1answer
776 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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2answers
2k 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 ...
4
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2answers
236 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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3answers
2k 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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2answers
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 ...
4
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1answer
89 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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3answers
4k 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 ...
2
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1answer
514 views

Anydice formula to calculate hit percentage against AC 5-25

I'm trying to create what I think is a simple formula in Anydice and struggling to figure it out. I roll a 20-sided dice, add a number x, and want to know the odds that the number will be greater or ...
11
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4answers
988 views

What's my most efficient use of spell slots to help my AC?

I've got a wizard with 11 Dex and I'm trying to figure out what my most efficient use of spell slots is to help me from getting hit. We typically have 2-4 very difficult encounters per day and I want ...
5
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1answer
647 views

How does a monster's AC from AD&D/2e relate to AC in D&D 5th Edition?

I want to adapt several creatures from AD&D/2e so I can use them in 5e. Is there an easy way to translate Armour Class from AD&D/2e to AC in 5e? I'm looking for a formula if possible. ...
13
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1answer
7k views

Is there any way to add your Charisma score to your Armor Class?

Bladesinging wizards add their Intelligence modifier to their AC while singing. Barbarians get an unarmored AC of 10+Dex+Con Monks get an unarmored AC of 10+Dex+Wis What are the ways, if any, in ...
8
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1answer
1k views

Can you wield a a typical shield and Aegis of the Raven Queen at the same time?

I know that you can only hold one shield at a time but the description of the Aegis of the Raven says that its plus magic bonus to AC stacks up with the current pluses from a shield that is currently ...
14
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2answers
4k views

How do I calculate my AC for this character?

I play a Tortle Draconic bloodline sorcerer and my DM and myself are scratching our heads on what it's AC total should be. Draconic Bloodline gets 13 + dex, but Tortles get 17 flat with no dex mod. I ...
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4answers
2k views

Is gaining 1 AC in exchange for disadvantage on Perception checks a balanced trade?

Inspired by this answer, and to avoid lengthy back and forth comments, I decided to make this a question in itself. You can put on your helmet for +1 AC and disadvantage on Perception checks. In ...

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