"It has been my honor to improve on the Thran's original design. Perhaps history will remember me in some small part for my work." —Urza, in his apprenticeship
As Primal Clay enters, 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.
At the beginning of each player's draw step, that player puts the cards in their hand on the bottom of their library in any order, then draws that many cards.