Is Charcoal Diamond legal in Standard, Modern, and Commander?

Charcoal Diamond is legal in: Legacy, Vintage, Commander, Pauper.

What type of card is Charcoal Diamond?

Charcoal Diamond is an Artifact. Its oracle text reads: "Charcoal Diamond enters tapped.{T}: Add {B}."

Artifact

Charcoal Diamond enters tapped.<br>: Add .

Set Mirage

Rarity Uncommon

Artist Drew Tucker

Artifact Commander Pauper Legacy