As an action, you create a whirling aurora of brilliant energy that swirls around you, protecting you from harm. Until the start of your next turn, you gain resistance to all damage, and if a hostile creature moves within 2 meters of you, it takes 1d10 damage. Choose a damage type: acid, cold, fire, or lightning.

Augment

You can increase the damage by 2d10 for each additional mana expended.