Eye of Singularity
Visions — rare
World Enchantment
Eye of Singularity rulings:
2008-10-01: This has the supertype world. When a world permanent enters the battlefield, 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 the battlefield at the same time, they’re both put into their owners’ graveyards.
2004-10-04: If a copy card enters the battlefield, the permanent it is copying is destroyed and the copy card stays on the battlefield.
2004-10-04: Since phasing in does not cause enters-the-battlefield ability to trigger, it is possible to phase in a card which is already on the battlefield and not trigger this effect.