Level
1st
Casting Time
1 Action
Range/Area
Self
Components
V, S, M *
Duration
1 Hour
School
Abjuration
Attack/Save
None
Damage/Effect
Acid
A protective layer of magical acid covers you and your gear while harming neither. You gain 5 temporary hits points for the duration. So long as you have these hit points, you may use your bonus action to spend one in order to make a melee spell attack against a creature within 5 feet, dealing 1d4 acid damage on a hit.
At Higher Levels. When you cast this spell using a spell slot of 2nd level or higher, the temporary hit points increase by 5, and the acid damage increases by 1d4, for each slot.
* - (a vial of black acid)
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Posted Apr 4, 2022This is essentially an element-swapped armor of Agathys but with the damage component changed to disambiguate it from that spell; instead of automatic cold damage on a hit, this one effectively grants a bonus action melee acid cantrip that costs a temporary hit point to use. While the damage isn't huge (even if you were to cast it at 9th level on a multiclass), it being a bonus action makes it easy to use. This spell is named for Porphatys, the acidic layer of Carceri.
I have also released two other variants of armor of Agathys in armor of Cathrys (poison) and armor of Kossuth (fire).