Elemental Soul

Prerequisite: The ability to cast at least one spell

When you gain this feat, choose one of the following damage groups:

Fire, Radiant, Cold, Necrotic, Lightning/Thunder, Poison, or Acid.

Once you choose a damage type, whenever you deal magic damage, the damage type is now the one you choose in this feat, unless the source is from a magic item. For example, if your casting scorching ray from a circlet of blasting, the damage type remains as fire. Additonally, this doesnt effect magical blugeoning, piercing, or slashing damage. 

You cannot take this feat more than once.