Elemental Focus

Prerequisite: The ability to cast at least one spell

When you gain this feat, You chose the element of focus (Thunder, Lightning, Fire, Cold, Wind or Earth) and the element of restriction. You gain the following effects:

• Spells you cast ignore resistance to damage of the element of focus. In addition you treat immunity as resistance> Once per long rest you can reroll the damage on a spell of the chosen type but you must keep the results of the new roll.
  
  
• You are incapable of using or learning spells of the chosen element of restriction (Thunder, Lightning, Fire, Cold, Wind or Earth)