Rancor is a common Enchantment — Aura card from World Championship Decks 1999 (WC99), collector number ml110. Current market price: $1.62, 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.