Dragons Spirit

{4} Sacrifice 1 life: All creatures get +2/+0
but all Dragons get +3/+3.
{4}{u}{u}{u} Sacrifice a land: All creatures gain
flying until end of turn ( all creatures that
already have flying get +1/+1 until end of turn)
{8}{u}{u} Sacrifice Dragons Spirit: All
creatures on the battlefield get flying for the
rest of the game. (Creatures already with flying
gets +2/+2 until end of turn.)