First of Stone

One of the caster's forearm and hand turns into flexible stone. Although they retain their sense of touch, that hand does not feel pain. They now have a Strength of 16 with that hand, unarmed attacks deal 1d8 bludgeoning damage, and that hand has resistance to acid, cold, fire, lightning, and poison damage. This resistances comes into effect only if they would take damage from touching something with that hand, not if they are attacked with that damage type.

At Higher Levels: When this spell is cast using a spell slot of 3rd level or higher, the hand's Strength is increased to 18 and its attacks deal 2d8 bludgeoning damage.

When this spell is cast using a spell slot of 5th level or higher, the hand's Strength is increased to 20 and its attacks deal 3d8 bludgeoning damage. Additionally, it gains immunity to the previously mentioned damage types.

When this spell is cast using a spell slot of 7th level or higher, the hand's Strength is increased to 22 and its attacks deal 4d8 bludgeoning damage.