As a reaction, which you use when you are hit by an attack or missed by 4 or less that you can see, you let the blow pass right through you. You have resistance to bludgeoning, piercing, and slashing damage from nonmagical weapon attacks until the start of your next turn, including against the triggering attack.

Augment

You can expend 1 additional mana to trigger the spell when a creature that you can see within 10 meters is attacked. The attacked creature gains the benefits instead.