Blasts the target with energy, dealing 1625 to 1888 Arcane damage. Each time you cast Arcane Blast, the damage of Arcane Blast and Arcane Explosion is increased by 10%, Arcane Blast casting time is reduced by 0.1 sec and Arcane Blast mana cost is increased by 150%. Effect stacks up to 4 times and lasts 6 sec or until any Arcane damage spell except Arcane Blast or Arcane Explosion is cast.