Is Coral Helm legal in Standard, Modern, and Commander?

Coral Helm is legal in: Legacy, Vintage, Commander.

What type of card is Coral Helm?

Coral Helm is an Artifact. Its oracle text reads: "{3}, Discard a card at random: Target creature gets +2/+2 until end of turn."

Artifact

, Discard a card at random: Target creature gets +2/+2 until end of turn.

Set Antiquities

Rarity Rare

Artist Amy Weber

Artifact Commander Legacy Vintage