Corrupted Moon

Ward: Sacrifice a creature. When Corrupted
Moon enters the battlefield, it becomes night.
Night cannot become day.
Discard a card: Gain control of target creature
until end of turn.
{t}, Pay 6 life: Destroy target creature you control
{4},{t}: You gain 10 life.
{6}, Pay 66 life, Sacrifice Corrupted Moon:
Search your library for up to six cards and
put them into your hand, shuffle your library.