|lore = You can only use each [[Card effect|effect]] of "Gaia, the Polar Knight" once per [[turn]].<br/>● You can [[Tribute]] 1 other [[DARK]] [[Monster Card|monster]]; [[Add a card|add]] 1 [[Level]] 4 [[LIGHT]] [[Warrior]]-[[Type]] monster from your [[Main Deck|Deck]] to your [[hand]], then [[send]] 1 card from your hand to the [[Graveyard]].<br/>● You can [[banish]] 1 LIGHT monster from your Graveyard, then [[target]] 1 monster you [[control]]; it gains 500 [[ATK]] until the end of your opponent's turn.