( can be paid with either or .)
When Petrahydrox becomes the target of a spell or ability, return Petrahydrox to its owner's hand.
( can be paid with either or .)
When Petrahydrox becomes the target of a spell or ability, return Petrahydrox to its owner's hand.
It departs through the streets' fissures with a sound like gravel pouring into a pond.
