Reaper Canyon

Reaper Canyon enters the battlefield tapped
{t}: add {c}
{1}, {t}: add {b}{b} or {r}{r}
{b/r}{b/r}{b/r}: Explore this biome (Choose one at
random: Create a 5/5 red leviathan creature token
with trample and first strike or sacrifice a creature or
Reaper Canyon deals two damage to any target)