You don't sacrifice Nevinyrral's Disk to activate its ability. It's destroyed as part of the ability's resolution if it's still on the battlefield. If an effect gives Nevinyrral's Disk indestructible or regenerates it, it stays on the battlefield.
Random a card of Magic: The Gathering (MTG), but you can also roll the D20 dice, random a Planeswalker, have fun with the random rules and more.
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: Destroy all artifacts, creatures, and enchantments.
Mark Tedin2007-09-10
