Energy Substitution (4e Feat)
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Energy Substitution [Class]
Your damaging powers with energy types can be of the type of your choice.
Prerequisite: Any Arcane Class
Benefit: When you choose this feat, choose acid, cold, fire, lightning, poison, psychic, necrotic, radiant, or thunder. Whenever you use a power with an energy type keyword, you may as a free action change that power's keyword to the type chosen with this feat. This also changes the type of damage dealt with the power to damage of the chosen type. If a power has more than one energy type keyword, you choose which one to change.
Special: You may select this feat multiple times. Each time you do, choose a different energy type.