Is Subterfuge legal in Standard, Modern, and Commander?

Subterfuge is legal in: Legacy, Vintage, Commander.

What type of card is Subterfuge?

Subterfuge is a Creature — Elemental Incarnation. Its oracle text reads: "When this creature enters, target creature gains flying and "Whenever this creature deals combat damage to a player, draw that many cards" until end of turn. Encore {7}{U}{U} ({7}{U}{U}, Exile this card from your graveyard: For each opponent, create a token copy that attacks that opponent this turn if able. They gain haste. Sacrifice them at the beginning of the next end step. Activate only as a sorcery.)"

Subterfuge

Creature — Elemental Incarnation

When this creature enters, target creature gains flying and "Whenever this creature deals combat damage to a player, draw that many cards" until end of turn.

Encore (, Exile this card from your graveyard: For each opponent, create a token copy that attacks that opponent this turn if able. They gain haste. Sacrifice them at the beginning of the next end step. Activate only as a sorcery.)