Crystal Sheath: Elemental Earth

The caster can touch a willing creature on a Bonus Action and creates a shimmering crystalline sheath that surrounds the target creature. The sheath will absorb magical damage of any Elemental Type (Earth, Air, Fire or Water) up to 20 Hit Points and provides +2AC. Once the 20 Hit Points is reached the crystalline sheath shatters and vanishes. It will do the same once the time limit is reached.

At higher levels the sheath gains 10 Hit Points per Spell Level above 3rd,