The Krosan Furnace

Indestructible
{t}, Pay 1 life: Add {r} or {g}.
{1}{r}{g}, {t}, Sacrifice a land: Search your library
for a land card, put it onto the battlefield, then
shuffle.
{5}{r}{g}, {t}, Sacrifice The Krosan Furnace: Deal
X damage to each opponent, where X is the
number of lands you control with different
names.