The Abyss {3}{B}

World Enchantment

At the beginning of each player’s upkeep, destroy target nonartifact creature that player controls of their choice. It can’t be regenerated.

“An immense river of oblivion is sweeping us away into a nameless abyss.”
—Ernest Renan, Souvenirs d'Enfance et de Jeunesse

Illustrated by Pete Venters

The controller of The Abyss controls the ability, but the current player chooses what gets destroyed. (2004-10-04)

This has the supertype world. When a world permanent enters, any world permanents that were already on the battlefield are put into their owners' graveyards. This is a state-based action called the "world rule." The new world permanent stays on the battlefield. If two world permanents enter at the same time, they're both put into their owners' graveyards. (2008-10-01)