Feat: Energetic Resonance
Trigger You would take acid, cold, electricity, fire, or sonic damage from a spell.
Requirements You have an unexpended spell slot of a rank equal to or higher than the triggering spell.
Your blood resonates with magical energy, mitigating the effects of harmful spells.
Expend one of your spell slots of a rank equal to or higher than that of the triggering spell. You gain resistance to one of the triggering effect's damage types equal to twice the expended spell slot's rank.