Is Amnesia legal in Standard, Modern, and Commander?

Amnesia is legal in: Legacy, Vintage, Commander.

What type of card is Amnesia?

Amnesia is a Sorcery. Its oracle text reads: "Target player reveals their hand and discards all nonland cards."

Sorcery

Target player reveals their hand and discards all nonland cards.

Set The Dark

Rarity Uncommon

Artist Mark Poole

Sorcery Commander Legacy Vintage