Is Impulsive Pilferer legal in Standard, Modern, and Commander?

Impulsive Pilferer is legal in: Legacy, Vintage, Commander, Pauper.

What type of card is Impulsive Pilferer?

Impulsive Pilferer is a Creature — Goblin Pirate. Its oracle text reads: "When this creature dies, create a Treasure token. (It's an artifact with "{T}, Sacrifice this token: Add one mana of any color.") Encore {3}{R} ({3}{R}, 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.)"

Impulsive Pilferer

Creature — Goblin Pirate

When this creature dies, create a Treasure token. (It's an artifact with ", Sacrifice this token: Add one mana of any color.")

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.)