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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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13
votes
3answers
3k 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
223 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 ...
10
votes
2answers
818 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 ...
3
votes
1answer
173 views

Lycanthrope AC & Magical Armor

Just a quick question here. One of my players was bit by a Lycanthrope and is currently cursed. Thing is that he plans on staying that since alignment won't alter anything for him. According to the ...
-4
votes
5answers
361 views

Is there anything that prevents this “Negative AC armor” creation process to function?

This is a follow-up to a portion of this answer to a previous question of mine pertaining to the lowest possible achievable AC. The question is also slightly different as it pertains to magical armor ...
1
vote
1answer
80 views

Does an enemy lose its Dex bonus to AC if it has a miss chance against me?

If I am invisible, the enemy loses its Dex bonus against me, and has a 50% miss chance. If I use Displacement, it also has 50% miss chance against me. Does it also lose its Dex bonus against my ...
12
votes
1answer
511 views

Does Medium Armor's Max dex also put a cap on the negative side?

I know heavy armor ignores Dexterity modifiers for AC calculations, but what about medium armor for a character with a -3 to their dexterity? Does Medium armor bottom out at -2, or will -3 still apply?...
11
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2answers
3k views

Do Dragonborns get unarmored defense?

Now, I might just be stupid or not have seen it but, I’ve been looking and saw that draconic bloodline sorcerers get unarmored defense for “draconic bloodline”. But, do Dragonborns get this for being ...
3
votes
1answer
242 views

The Beast Master ranger adds their proficiency bonus to their animal companion's AC; is the result its new base AC?

As per the Ranger Companion feature, you can add your proficiency bonus to your companion's AC. I would like to know how to interpret this in terms of AC calculation. Could I interpret as though my ...
12
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2answers
496 views

Does the Defensive Duelist feat stack with the AC calculation from the Warforged's Integrated Protection trait?

The warforged integrated protection uses your proficiency bonus as part of the calculation for your AC at all 3 levels if you are proficient in that armor type. The Defensive Duelist feat allows you ...
20
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3answers
2k views

What is the lowest possible AC?

This is a direct, somewhat silly, opposite question to What is the highest possible AC? . I’m wondering what is the lowest possible Armor Class a Player Character can get at any point in time, “...
4
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2answers
120 views

Does the Invisible Blade's Unfettered Defense feature work if you're under the effect of the Mage Armor spell?

The Invisible Blade's Unfettered Defense feature (CW 46) says: An invisible blade benefits from an increased survival instinct during combat. Because of this sixth sense, he adds 1 point of ...
4
votes
1answer
316 views

How does the AC of ships in Ghosts of Saltmarsh interact with the optional vehicle proficiency rules from Xanathar's?

In Xanathar's Guide to Everything, there is an ability under "Land and Water Vehicles" (p. 82) called Vehicle Handling which allows you to add your proficiency bonus to the AC of a land/water vehicle ...
7
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1answer
526 views

Do AC-increasing items impair a monk's Unarmored Defense as if they were armor?

It's my first campaign, and I'm playing as a monk. My party recently discovered a ring of protection that increases AC by 1, and my party members want to give it to me. I didn't know whether wearing ...
15
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4answers
3k views

What is the highest possible temporary AC at level 1, without any help from others?

Assuming you are level 1 and have access to any item that you can afford at character creation rolling the maximum amount of starting gold, and all spells that are available to you due to character ...
7
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4answers
3k views

What is the highest possible permanent AC at character creation?

Assuming you are level 1 and have access to any item that you can afford at character creation rolling the maximum amount of starting gold, how high can your permanent AC become (permanently, not for ...
-1
votes
1answer
401 views

How is the Cost of armour affected by the armour's attributes such as AC and type?

The 'Armor and Shields' section of the Player's Handbook lists the AC and Cost of armour and shields. The top end of each armour type (Light, Medium, Heavy) is substantially more expensive than the ...
23
votes
2answers
3k views

If you attack a Tarrasque while swallowed, what AC do you need to beat to hit it?

If you get swallowed by a Tarrasque, your only way of getting out is to deal it enough damage to force it to regurgitate you (60 damage or more on a single turn). There's no mention of the AC when ...
6
votes
1answer
229 views

Is there any way I can increase my griffon's AC?

I’m a level 3 Sorcerer and I have a griffon figurine that allows me to summon a griffon. My DM allows me to use it once a day (lasting 6 hours) and it has a base AC of 12. I can increase it to 13+Dex ...
4
votes
2answers
619 views

Mage Armor with Defense fighting style (for Adventurers League bladeslinger)

The Defense fighting style says: While you are wearing armor, you gain a +1 bonus to AC. Can use still use this if your mage armor AC is overriding your armor's AC because you are still wearing ...
5
votes
1answer
69 views

Is the Wall of Blades maneuver affected by AC penalties?

Do AC penalties (and bonuses, for that matter) apply to the Wall of Blades manuever? Bob the martial adept has prepared Wall of Blades this morning. He also acquired Shocktrooper last week. Bob's ...
16
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2answers
2k views

How much attack damage does the AC boost from a shield prevent on average?

Statistically, how much attack damage does the AC boost from a shield prevent on average? I've seen claims it results in a 10% reduction in damage taken, is that accurate?
17
votes
1answer
662 views

Which Armor Class values should be used as controls when making damage calculations?

It is known that occasionally questions will pop up that are about attempts to optimize a character's damage output (sometimes shorthanded as DPR, or Damage-per-Round), and veterans of this game know ...
3
votes
1answer
323 views

What type of bonus is a Monk's bonus to AC?

What type of bonus is a Monk's AC bonus in Pathfinder, Natural, Deflect, Or some other type? All I know is that it's a Wisdom bonus.
2
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0answers
809 views

How does Dragon Hide interact with monk AC? [duplicate]

Before I begin let me preface this with the following: I understand that mechanically speaking the barbarian and Monk armor classes are calculated 10 + Dex mod + Wis/Con depending on the class played. ...
4
votes
2answers
1k views

What options exist to improve a low level Sorcerer's armor class?

I'm creating a character for a new D&D 5e campaign soon. We'll be starting at level 3 to reduce PC mortality, and I don't expect the campaign to run long enough for more than a couple level ...
5
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1answer
230 views

Can you wear Bracers of Armor or an Amulet of Natural Armor with Dragonscale Husk?

Dragonscale Husk, from Dragon Magic, is a cool alternate class feature (ACF) for characters with dragon blood and proficiency in heavy armor. It's useful for a lot of reasons: decent defenses that ...
4
votes
1answer
544 views

In Wild Shape for druid5/barbarian1, how does unarmored defense work? [duplicate]

Background: My Hill-dwarf character started out as a barbarian. When his clan battled the undead hordes, he barely escaped with his life. He was taken in by a druid, and discovered a higher calling. ...
1
vote
1answer
110 views

What other actions is Total Defense referring to when it says it can't be combined with other actions that increase your AC?

Total Defense states: You can defend yourself as a standard action. Starting at the beginning of this action, you get a +4 bonus to your Armor Class until the start of your next turn. You can’t ...
3
votes
1answer
6k views

Does an attack hit if it exactly matches the target's AC?

For an attack to successfully hit a given Armor Class, would it need to get a number higher than the Armor Class or does it hit with the exact number as well?
27
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3answers
3k views

What rules or guidelines are there about when to allow a party to acquire plate mail?

I have heard it said that 5e does not balance its encounters with respect to magic items; in other words it does not consider possession of magic items when defining appropriately challenging ...
17
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5answers
2k views

Is there a feat that allows you to subtract a number from your AC and add it to your attack roll?

Is there a feat that's the opposite of the Combat Expertise feat? I'm looking for a feat which would allow you to subtract a number from your AC and add it to your attack roll.
11
votes
2answers
1k views

What is the AC of Land Vehicles?

In regards to the AC and HP of vehicles, the DMG includes a table on Water and Air vehicles on page 119. However, no analogous table exists for Land Vehicles. I am aware of the rules on Objects in ...
14
votes
1answer
1k views

As a Swords bard, how do I determine my AC bonus from Defensive Flourish on a critical hit?

Let's say I'm playing a College of Swords bard, and happen to critically strike an enemy with a natural 20. I choose to use my Defensive Flourish at this time, so the dice look like this: 2d6 (...
8
votes
1answer
606 views

Is the AC of a Mirror Image Duplicate fixed at Point of Casting?

The spell Mirror Image states the following: A duplicate's AC equals 10 + your Dexterity modifier. However - if you were to cast Mirror Image, and then change your DEX (e.g. by equipping/...
12
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2answers
2k views

Is it possible to increase the AC of a mirror image duplicate?

Pretty straight forward question. By RAW, is it possible to increase the AC of the duplicates created by mirror image or they will always have an AC equal to 10 + Dex modifier? Be it using other ...
0
votes
0answers
364 views

Does magic armor grant an enhancement bonus to its armor bonus, or directly to your AC? [duplicate]

My previous assumption was that magic armor and magic shields gain an enhancement bonus to their own armor/shield bonuses, which indirectly translates to increased AC. However, in the process of ...
3
votes
1answer
159 views

How does surprise affect AC?

Under wrestling rules, the Grindhouse rulebook tells that everyone involved in wrestling is attacked as though they were surprised. Under Encounters, in the surprise section, there is info on how to ...
15
votes
5answers
4k views

Can a target have two Armor Class (AC) values?

I had an idea for a kobold-operated tank. The armor would be thick enough to be immune to damage from all mundane projectiles (arrows, bolts, flintlocks, javelins, etc.), and resistant to magic and ...
15
votes
6answers
2k views

Consequences of having half damage on attacks that tie AC as house rule?

Typically if an attack roll equals the AC of a target then the attack does normal damage. I quite like the idea of making it a glancing blow, dealing half damage instead, this would help clue the PCs ...
0
votes
1answer
710 views

What defines an armor?

There are some spells and perks that require not having armor on to work, so how is armor defined? Is it just any equippable gear that has additional AC? Is it anything more durable than regular ...
1
vote
2answers
12k views

How you calculate a warforged barbarian's AC?

I am looking at the warforged AC calculation from the Integrated Protection feature, looking only at Darkwood Core (unarmored), for a possible warforged barbarian. (I am using the version of the ...
23
votes
2answers
3k views

Can you benefit from the Defense fighting style while not using armor AC calculation?

Let's assume a Lizardfolk fighter, with the Defense fighting style, wearing leather armor. Lizardfolk, per Volo's p. 113, get Natural Armor: You have tough, scaly skin. When you aren't wearing ...
8
votes
3answers
963 views

Does a lycanthrope's AC change when shapechanged from a form wearing armor?

Weretigers (and all lyncathropes; Monster Manual p. 210) have the Shapechanger trait: The weretiger can use its action to polymorph into a tiger-humanoid hybrid or into a tiger, or back into its ...
6
votes
1answer
815 views

Does the UA Mystic's Tough Hide bestial transformation (+2 AC) stack with the UA Warforged's Composite Plating trait (+1 AC)?

Unearthed Arcana: The Mystic Class contains the most recent version of the Mystic class (v3). One of the psionic disciplines listed is Bestial Form; one of its psionic effects is Bestial ...
1
vote
0answers
325 views

Mage Armor + Unarmored Defense? [duplicate]

Playing a barbarian, and thought the Magic Initiate feat would be a good way to grab some range cantrips and a single-use utility spell. Originally thought of going with warlock, but DM suggested I go ...
8
votes
5answers
5k views

Staff of Defense total AC and Shield Stacking

My party is about to confront Glasstaff and potentially obtain the Staff of Defense. This slender, hollow staff is made of glass yet is as strong as oak. It weighs 3 pounds. You must be attuned to ...
11
votes
1answer
386 views

Share monk AC bonus with animal companion mount?

I have a swift and deadly hunter variant druid, who gains “Bonus to Armor Class when unarmored (as monk, including Wisdom bonus to AC).” He rides his animal companion as a mount. I was wondering if ...
5
votes
1answer
831 views

AC calculations in the D&D 5e German Starter Set

I'm just getting into D&D and I'm having trouble understanding the calculations of the ac right. On the predefined character sheets in the Starter Set, each character has his "starting" AC value ...
1
vote
1answer
1k views

AC Bonus Class Feature [closed]

Other than Monk, Swashbuckler, and Brawler, what are some classes that give you an AC bonus from having the class?