Armor of Invulnerability
D&D 5e · 2014·Heavy armor·Legendary·Requires attunement
Your Dexterity modifier does not change this Armor Class, up or down.
Armor Class calculator
- Category
- Heavy armor
- Dex bonus
- None
- Stealth
- Disadvantage
- Strength
- Str 15 (else −10 ft. Speed)
- Weight
- 65 lb
- Don / doff
- 10 minutes / 5 minutes
- Rarity
- Legendary
- Price
- Not specified
Magic: Wear this armor.
Calculator assumptions & rules
Uses this entry’s AC formula, Dexterity cap and listed shield bonus. Magic AC already included in the entry is counted once. Features, spells, alternative AC formulas and exceptions to Strength penalties are excluded. You still need the required armor training or proficiency.
Changing calculator inputs does not change the item’s rules or create a new page URL.
What Armor of Invulnerability does
- AC 18 does not improve with Dexterity. Compare armor options using your actual Dexterity modifier rather than their base AC alone.
- It imposes Disadvantage on Stealth checks; consider that cost if the group relies on sneaking.
- Strength 15 avoids this armor’s listed Speed penalty. The calculator flags the penalty when your Strength is lower.
- This item uses one of your attunement slots. Compare its benefit with the other items you want to keep attuned.
You have resistance to nonmagical damage while you wear this armor. Additionally, you can use an action to make yourself immune to nonmagical damage for 10 minutes or until you are no longer wearing the armor. Once this special action is used, it can't be used again until the next dawn.
Full item details & properties
Magic properties
- Activation
- Wear this armor.
- Consumable
- No
- Nonmagical damage
- Resistance to all nonmagical damage while wearing. Action: immunity to nonmagical damage for 10 minutes or until removed; once until next dawn.
Armor details
- Armor Class
- 18
- Category
- Heavy
- Dexterity modifier
- Not added
- Strength to avoid Speed penalty
- 15
- Stealth disadvantage
- Yes
- Don
- 10 minutes
- Doff
- 5 minutes
Tags & related references
Compare alternatives
Same edition, using your calculator inputs above. Special properties and character features can change the choice.
Same base armor; compare magical benefits
Adamantine Armor (Plate Armor)AC 1818 AC · Stealth DisadvantageNot specified · 65 lbSame base armor; compare magical benefits
Armor of Resistance (Plate Armor)AC 1818 AC · Stealth DisadvantageNot specified · 65 lbSame base armor; compare magical benefits
Armor of VulnerabilityAC 1818 AC · Stealth DisadvantageNot specified · 65 lbSame base armor; compare magical benefits
Armor of Invulnerability FAQ
What Armor Class does Armor of Invulnerability give?
It starts at AC 18. Dexterity does not change its AC, whether your modifier is positive or negative.
Does Armor of Invulnerability require attunement?
Yes. You need to attune to this item to use the properties that require attunement.
What if my Strength is below 15?
The armor lists a 10 ft. Speed penalty below Strength 15. The calculator flags it; character features may provide exceptions.
Is the listed price a guaranteed purchase price?
The source does not specify a price for this entry. Ask your GM about availability and cost.