Spell of Nature and Reality

Enchant Artifact
If a creature was played this turn, this card costs {3} less
Creatures under your control get +3/+1 and
Haste and Trample until end of turn
At end of turn, sacrifice a creature and gain life
equal to its toughness
Enchanted Artifact has no abilities and is devoid
The enchanted artifact's controller may sacrifice
it at any time and gain 3 life