World Enchantment, 3B (4) At the beginning of each player's upkeep, destroy target nonartifact creature that player controls of his or her choice. It can't be regenerated.1 "An immense river of oblivion is sweeping us away into a nameless abyss." -Ernest Renan, Souvenirs d'Enfance et de Jeunesse
Illus. Pete Venters
This is a targeted ability. The Abyss targets one creature each upkeep. It cannot target creatures which are untargetable, such as those with Protection from Black. [Aahz 1994/07/13]
If the target becomes invalid after being chosen but before resolution, you do not have to choose another target. [Duelist Magazine #16, Page 25]
The controller of The Abyss controls the ability, but the current player chooses what gets destroyed. [Barclay 2000/12/31]
Extended tournaments (see Rule 803) have always banned this card.