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And since you can untap all creatures you control and fight again with this out, its basically a bit more dakka when you need it most

The whole point is to turn their own cards against them and mess up their strategy, so getting to look at (and memorize) the opponent's hand, discard something from it, and then using another quick effect card to re-equip the Relinquished/Eyes Restrict with something else is effective

Urzas Command Urza's Command is an extremely strong command in the right deck

Its not inconceivable that a deck with graveyard or madness synergies could want this out of the sideboard, but its not likely

Your opponent has no Active and Benched Pokemon to use in the field Once your opponent has no more Pokemon to play, you will automatically win the game