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

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

What type of card is Trigon of Corruption?

Trigon of Corruption is an Artifact. Its oracle text reads: "This artifact enters with three charge counters on it. {B}{B}, {T}: Put a charge counter on this artifact. {2}, {T}, Remove a charge counter from this artifact: Put a -1/-1 counter on target creature."