Sphere Of Annihilation

This enters with X Void counters on it.
At the beginning of your upkeep, you may pay {p/c}{p/c}, then the player to your left gains control of
this artifact. If you do, destroy target nonland,
nonlegendary permanent with a mana value
equal to or less than the Void counters on this artifact.
Incentive- If a treasure was spent to cast this spell,
add 1 to X.