Heating Up
Heating Up is a Mage spell in the WoW Forever client.
Non-periodic critical strikes with Fireball, Frostfire Bolt, Fire Blast, and Scorch reduce the cast time of your next Pyroblast cast within 20 sec by 25%, stacking up to 3 times. Fire Blast grants an additional stack every time it deals damage.
Data from the WoW Forever client, build 1.60.1.70862, extracted .