Chronomancer Regalia

2 pieces: (2) Set: Arcane Missiles causes your next Arcane Blast within 10 sec to cost 25% less mana, stacking up to 4 times. Consuming Brain Freeze increases the damage of your next Ice Lance, Frostbolt, Frostfire Bolt, or Cone of Cold by 20%. Consuming Pyroblast! increases your haste by 13 for 5 sec, stacking up to 5 times.

4 pieces: (4) Set: Arcane Missiles has a 15% chance to not consume Arcane Missiles!. Consuming Brain Freeze has a 30% chance to drop an icy boulder on your target. Inferno Blast also causes your next Pyroblast to be a critical strike.