Crystal armor

Coat yourself in a crystal armor with claws. Gain 50 temporary hit points and grow crystal claws

While the spell is active you can use your bonus action to make a melee attack with your int-modifier. Dealing 1d12+int magical slashing damage.

If you cast the spell while the spell is active your claws grow longer and stronger dealing an extra 1d12 dmgage.

The spell ends early if all temporary hit points are gone