Sozin's Comet

Suspend 3—{r}{r}{r}(Rather than cast this card
from your hand, pay {r}{r}{r} and exile it with four
time counters on it. At the beginning of your upkeep,
remove a time counter. When the last is removed, cast
it without paying its mana cost.)
This spell can't be countered.
Each Firebender you control deals damage
equal its power to any target.