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Galadriel could be a viable inclusion in Bant-colored Blink decks in Commander, where players might be able to trigger her ability multiple times

Seeing as this deck only utilizes a Stage one and a Basic Pokemon, you can keep the Pokemon in your deck down to six cards

Other must kill creatures provide multiple targets for removal, making it harder for an opponent to ensure they can take care of Niv-Mizzet

It doesn't copy whether the creature is tapped or untapped, whether it has any counters on it or Auras and/or Equipment attached to it, or any non-copy effects that changed its power, toughness, types, color, and so on