Is Trigon of Rage legal in Standard, Modern, and Commander?

Trigon of Rage is legal in: Modern, Legacy, Vintage, Commander.

What type of card is Trigon of Rage?

Trigon of Rage is an Artifact. Its oracle text reads: "This artifact enters with three charge counters on it. {R}{R}, {T}: Put a charge counter on this artifact. {2}, {T}, Remove a charge counter from this artifact: Target creature gets +3/+0 until end of turn."