Ratchet Bomb
Scars of Mirrodin — rare
Artifact
Ratchet Bomb rulings:
2020-08-07: Tokens that aren't a copy of something else don't have a mana cost. Anything without a mana cost normally has a mana value of 0.
2020-08-07: If a permanent has in its mana cost, X is considered to be 0.