As two actions, you call forth spirits to protect you. They flit around you in an aura shaped as a sphere. The guardian spirits provide supernatural protection. As a reaction, which you use when a creature that you can touch or see within 5 meters of you takes damage, you can reduce that damage by double the mana expended to cast this spell and the attacker takes psychic damage equal to double the mana expended to cast this spell. An enemy creature that enters the spell’s area for the first time on a turn or starts its turn there must make a Will saving throw.

On a failure, it takes 1d8 psychic damage, moves at half speed, and has disadvantage on skill checks while in the area.

On a critical failure, it takes twice as much damage.

On a success, it takes half as much damage.

On a critical success, it takes no damage.

Augment

You can increase the damage by 1d8 for every two additional mana expended.