You can only use each effect of 'Gaia The White Knight' once per turn.
● You can Tribute 1 other LIGHT monster you control; add 1 Level 4 DARK Warrior-Type monster from your Deck to your hand, then send 1 card from your hand to the Graveyard.
● You can banish 1 DARK monster from your Graveyard, then target 1 monster on the field; that target loses 500 ATK, until your opponent's End Phase.
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