As an action, a magical field appears around you, glowing with a chaotic blast of multicolored hues. For the duration, any creature has disadvantage on attacks made against you.

Augment

You can expend 1 additional mana to cast the spell as a reaction, which you use when you are hit by an attack or missed by 4 or less. The attacker must make an additional roll and use the worst result and the duration changes to the end of your next turn.