Stoneskin A5E
4th-level abjuration
Until the spell ends, the target's flesh becomes as hard as stone and it gains resistance to nonmagical bludgeoning, piercing, and slashing damage.
At higher levels
When using a 7th-level spell slot, the target gains resistance to magical bludgeoning, piercing, and slashing damage.
Other versions
Source: Adventurer's Guide (EN Publishing) · License: Creative Commons Attribution 4.0 / OPEN GAME LICENSE Version 1.0a details