You enshroud your fist in stone, allowing for a more powerful unarmed strike. For the duration your unarmed strikes deal 1d12 magical bludgeoning damage. The transmutation does not enhance your ability to hit and you make melee attacks without adding your spell attack modifier.

The spell becomes more powerful as you reach higher levels. 2d12 at 5th level, 3d12 at 11th level, and 4d12 at 17th level.