Heatsink Engine

Whenever you cast a red spell, Heatsink Engine
gets +X/+0 until end of turn, where X is the
number of {r} in that spell's mana cost.
{r}{r}{r}, Sacrifice Heatsink Engine: It deals
damage equal to its power to target creature
or planeswalker.
The crystal that powers this golem exists in a
permanent state of energy starvation, always
hungry for more heat.