Abomination of Llanowar is a uncommon Legendary Creature — Elf Horror card from Magic Online Promos (PRM), collector number 86300.
Vigilance; menace (This creature can't be blocked except by two or more creatures.) Abomination of Llanowar's power and toughness are each equal to the number of Elves you control plus the number of Elf cards in your graveyard.