Engrave Pants - Arcane Surge

Engrave your pants with the Arcane Surge rune: Unleash all of your remaining mana in a surge of energy focused at the target dealing 394.7 to 425.3 Arcane damage, increased by up to 300% based on your mana remaining. Afterward, your normal mana regeneration is activated and increased by 300% for 8 sec.