Is Horizon Stone legal in Standard, Modern, and Commander?

Horizon Stone is legal in: Legacy, Vintage, Commander.

What type of card is Horizon Stone?

Horizon Stone is an Artifact. Its oracle text reads: "If you would lose unspent mana, that mana becomes colorless instead."

Artifact

If you would lose unspent mana, that mana becomes colorless instead.

Set Commander Legends

Rarity Rare

Mana Value 5

Artist Noah Bradley

Collector # 315

Scryfall Gatherer

Artifact Commander Legacy Vintage

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