Is Crooked Scales legal in Standard, Modern, and Commander?

Crooked Scales is legal in: Legacy, Vintage, Commander.

Crooked Scales

Q: What type of card is Crooked Scales?

Crooked Scales is an Artifact. Its oracle text reads: "{4}, {T}: Flip a coin. If you win the flip, destroy target creature an opponent controls. If you lose the flip, destroy target creature you control unless you pay {3} and repeat this process."

Artifact

, : Flip a coin. If you win the flip, destroy target creature an opponent controls. If you lose the flip, destroy target creature you control unless you pay and repeat this process.