Rancor is a uncommon Enchantment — Aura card from Explorers of Ixalan (E02), collector number 35. Current market price: $2.09, TCGplayer market prices via Scryfall.
Enchant creature Enchanted creature gets +2/+0 and has trample. When this Aura is put into a graveyard from the battlefield, return it to its owner's hand.