Rulings

• 2012-07-01
  In zones other than the battlefield, Primal Clay is 0/0.
• 2012-07-01
  If another permanent enters the battlefield as a copy of Primal Clay, the controller of that permanent will get to make a new choice. The copy won't necessarily have the same power, toughness, and abilities as the original.
• 2012-07-01
  If a creature that's already on the battlefield becomes a copy of Primal Clay, it copies the power, toughness, and abilities that were chosen for Primal Clay when it entered the battlefield.
• 2021-03-19
  While not on the battlefield, Primal Clay is a 0/0 creature card. It doesn't have flying or defender.
• 2021-03-19
  If an object on the battlefield becomes a copy of Primal Clay, it copies the values determined by its enters-the-battlefield replacement effect.
• 2021-03-19
  If an object enters the battlefield as a copy of Primal Clay, it copies the values determined by its enters-the-battlefield replacement effect, but its power and toughness are determined by the copy's own enters-the-battlefield replacement effect. This can cause you to have a 3/3 creature with flying, or a 1/6 creature with flying and defender, for example.