Eagle Cluster Bomb

Pick an opponent and Flip a coin.
•If Heads: Destroy X Target Creatures or Artifacts
that opponent controls where X is the {x} spent to
cast this spell.
•If Tails: Destroy X Target Creatures or Artifacts
that you control rounded down where X is the {x} spent to cast this spell. Then destroy X target Creatures or Artifacts your opponent controls
where X is the remaining {x} used to cast this spell.