Armorize

The user begins forming plate-like armor on their body and a skull mask appears on their face. This form lasts for 10 minutes.

The user rolls a 1d8 plus their Constitution modifier and adds the result to their AC and their unarmed strike becomes 2d10. Spells and weapons cannot be used while in this form.

At Higher Levels:

 When you cast this spell using a spell slot of 6th level or higher, this spell's unarmed strike damage increases by 1d10 for every level above the 5th.