As Primal Clay enters the battlefield, it becomes your choice of a 3/3 artifact creature, a 2/2 artifact creature with flying, or a 1/6 Wall artifact creature with defender in addition to its other types. (A creature with defender can't attack.)
When Primal Clay comes into play, choose whether to make it a 1/6 wall, a 2/2 creature with flying, or a 3/3 creature.
--This card has no flavor text --
