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.

Filter by
Sorted by
Tagged with
3
votes
0answers
48 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
votes
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
votes
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
votes
1answer
574 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
votes
1answer
447 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
votes
1answer
306 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
votes
2answers
1k views

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 (...
3
votes
1answer
130 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?
21
votes
1answer
761 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 ...
6
votes
2answers
314 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 –...
6
votes
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 ...
4
votes
0answers
168 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 ...
41
votes
7answers
10k 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
votes
1answer
539 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
votes
1answer
704 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 ...
3
votes
4answers
821 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 - ...
5
votes
1answer
451 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?
6
votes
4answers
3k 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 ...
11
votes
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
votes
1answer
1k 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
votes
1answer
94 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
votes
1answer
276 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
votes
1answer
191 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?
0
votes
3answers
90 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 ...
3
votes
1answer
764 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
votes
1answer
214 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
votes
1answer
225 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
votes
2answers
935 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 ...
0
votes
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 ...
2
votes
3answers
1k 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
votes
1answer
503 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?
8
votes
2answers
973 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
votes
2answers
221 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 ...
15
votes
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 ...
17
votes
2answers
3k 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
votes
1answer
78 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. - ...
11
votes
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
votes
1answer
357 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
votes
4answers
858 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
votes
1answer
414 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
votes
1answer
5k 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 ...
9
votes
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
votes
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 ...
13
votes
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 ...
0
votes
3answers
167 views

What feats or another options can help to avoid touch attack?

If character have only 10 DEX, he becomes vulnerable for touch attacks, because this kind of attacks don't count the armor. What feat i can take, or what i must do to avoid this attacks, or at least ...
4
votes
1answer
1k views

What are the ability modifiers (other than Dex) that can be used when calculating AC?

As far as my knowledge of D&D goes there are 2 ways to determine AC: Calculation of AC through Base + Stat modifiers Examples of these AC calculations are: Unarmored = 10 + Dex mod Unarmored ...
3
votes
1answer
928 views

Where can I find my Animal Companion's AC?

For familiars, it is quite easy to find that they have your AC. How can I find the AC of my Animal Companion?
13
votes
3answers
4k views

Can a character dodge an attack that beats their Armor Class?

I am DMing a campaign. The party was fighting two castle guards, and killed one of them. The other guard attacked them, got past the AC of one of my players. He said he could dodge, but I don't know ...
3
votes
1answer
2k views

How does the Swashbuckler's Suave Defense feature work with the Robe of the Archmagi? [closed]

If I were to give Suave Defense trait to a player and if they have the Robe of the Archmagi, how would it work? Suave Defense states: While the swashbuckler is wearing light or no armor and ...
11
votes
2answers
4k views

Can a warforged druid use composite plating?

A druid gains medium armor proficiency, but is not allowed to use metal armor. A warforged with medium armor proficiency can normally set their Integrated Protection to Composite Plating, granting an ...

1
2 3 4 5