Is Staff of Zegon legal in Standard, Modern, and Commander?

Staff of Zegon is legal in: Legacy, Vintage, Commander, Pauper.

What type of card is Staff of Zegon?

Staff of Zegon is an Artifact. Its oracle text reads: "{3}, {T}: Target creature gets -2/-0 until end of turn."

Artifact

, : Target creature gets -2/-0 until end of turn.

Set Antiquities

Rarity Common

Artist Mark Poole

Artifact Commander Pauper Legacy