Arcane Admixture is a paragon-tier feat available to any arcane class.[AP:130] Choose one arcane power that you know, and choose acid, cold, fire, lightning, or thunder. The power now deals that damage type in addition to its normal damage type and gains that keyword. Each time you gain a level, you can choose to reassign either the power to which this feat's effect applies or the additional damage type applied (or both). Special: This feat may be taken more than once. Each time this feat is selected, choose a different power. You can't apply this feat to the same power more than once.