Regalia of the Chromatic Hydra

2 pieces: (2) Set: Increases critical strike chance of Fireball, Frostbolt, and Arcane Blast by 10%.

4 pieces: (4) Set: Increases the effects of Arcane Charges by 5%, increases the critical strike chance of Pyroblast by 5%, and increases the chance for your Frostbolt to trigger Fingers of Frost by an additional 6%.