Sliver Hive was only ever printed in Magic 2015, apart from a super rare version that was a Secret Lair bonus card - obtainable at random
Heres a quick guide on how to build and use the Sky Striker deck in Yu-Gi-Oh
It might not seem like a lot since three mana isnt a huge commitment, but it can mean the difference between playing just one creature face-down and passing, and playing a creature face-down and then being able to flip it back over before your next turn
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Equip is usually written as equip X:, and a player can pay the cost (X) any time they could cast a sorcery to attach the equipment to target creature they control
This foiling is exclusive to the Streets of New Capenna set, with the sole exception being a Secret Lair version of Atraxa, Praetors Voice.