Primal Instincts

Spellbreaker Fury

When you use your persistent rage, you have advantage on saving throws against spells while raging.

Rage Power: Spellbreaker Fury

Starting at 11th level, when you succeed on a saving throw against a spell, the next melee attack you make before the end of your next turn becomes a critical hit if you hit. To gain this benefit, the attack must be made against the creature that cast the spell. You can use this ability once per rage.