Rancor

Oracle Text

Enchant creature

Enchanted creature gets +2/+0 and has trample.

When Rancor is put into a graveyard from the battlefield, return Rancor to its owner's hand.

Card Rulings

3/16/2018 If the creature this Aura would enchant is an illegal target by the time Rancor tries to resolve, the Aura spell doesn’t resolve. It won’t enter the battlefield, so it won’t be put into a graveyard from the battlefield and its ability won’t trigger.