Harvest Wurm
Weatherlight — common
Creature — Wurm
Harvest Wurm rulings:
2008-04-01: When the ability resolves, you choose whether to sacrifice the creature or perform the other action. If you can’t perform the other action, then you must sacrifice the creature.
2008-04-01: If the creature is no longer on the battlefield when the ability resolves, you may still perform the action if you want.