Talk:Rumble/@comment-71.10.43.141-20110421222933/@comment-1430336-20110422011301

He starts at 0 heat with a maximum of (I think) 120. So they have no cost and add X amount to heat from you when you use them. Once you're in the danger zone (at least 50% heat), spells deal bonus damage. The ideal play is usually to cast just enough spells to stay in the danger zone, but sometimes it's worth it to cast extra spells, overheat yourself, and gain bonus damage from the passive. - Guinsoo