Energetic Resonance Feat 6
Source Pathfinder Advanced Player's Guide
Trigger You would take acid, cold, electricity, fire, or sonic damage from a spell.
Requirements You have an unexpended spell slot of a level
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 level 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 level.
Traits
Anything that doesn't list another rarity trait (uncommon, rare, or unique) automatically has the common trait. This rarity indicates that an ability, item, or spell is available to all players who meet the prerequisites for it. A creature of this rarity is generally known and can be summoned with the appropriate summon spell.
AbjurationEffects and magic items with this trait are associated with the abjuration school of magic, typically involving protection or wards.
SorcererThis indicates abilities from the sorcerer class.