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I've seen this card bandied about to imply that Urza (Magic the Gathering) is able to just annihilate and remake planes with a snap of his finger, partly going off the flavor text as "proof".
As I understand it, Urza's powerful, but that's not remotely within his ability. The flavor text refers to an event in one of the books where he attempts to destroy the artificial plane of Phyrexia, which required tons of prep work across a war that stretched on for centuries, and used special high-powered Artifacts, targeting the "heart" of the plane in specific in order to wipe out the Phyrexian threat.
If he could just snap away whole planes of existence, the Weatherlight Saga wouldn't have even been necessary. Unless he was just holding out so Wizards of the Coast could sell more books. :B