Bubastis, Guardian Beast

Vigilance, Haste, Lifelink, Indestructible
Bubastis, Guardian Beast can't attack or block unless you control at least three other Legendary creatures.
Sacrifice a creature,{t}: Search your library for a legendary card, reveal that card, and put it into your hand. Then shuffle your library.
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"It serves the gods and no one else."-Daxos