Is Unerring Sling legal in Standard, Modern, and Commander?

Unerring Sling is legal in: Legacy, Vintage, Commander.

Unerring Sling

Q: What type of card is Unerring Sling?

Unerring Sling is an Artifact. Its oracle text reads: "{3}, {T}, Tap an untapped creature you control: Unerring Sling deals damage equal to the tapped creature's power to target attacking or blocking creature with flying."

Artifact

, , Tap an untapped creature you control: Unerring Sling deals damage equal to the tapped creature's power to target attacking or blocking creature with flying.