Avoid Grievous Injury

1st-level · Divination

Casting Time 1 reaction, which you take when you are struck by a critical hit

Range Self

Components V, S

Duration Instantaneous

Classes Cleric, Druid, Bard, Sorcerer, Warlock, Wizard

You cast this spell when a foe strikes you with a critical hit but before damage dice are rolled. The critical hit against you becomes a normal hit.

Source: Deep Magic 5e · OGL/Open