Red Death

Trample, hexproof, annihilator X, menace
Exert: While attacking, Red Death gains Flying and First-strike until end of turn
{t}: Add {b/r}{b/r} to your mana pool
{t}{3}: Destroy up to X target non-land permanents and X target lands
Red Death's power and toughness is equal to X+3
{r}{3}: Target creature untaps, you gain control of that creature until end of turn