+koilos (3)
: Add .
: Add or . Caves of Koilos deals 1 damage to you.
When Guardians of Koilos enters, you may return another target historic permanent you control to its owner's hand. (Artifacts, legendaries, and Sagas are historic.)
Flash
Flying
When Koilos Roc enters, create a tapped Powerstone token. (It's an artifact with ": Add . This mana can't be spent to cast a nonartifact spell.")
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