When Impulsive Pilferer dies, create a Treasure token (A Treasure is an artifact with ", Sacrifice this artifact: 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 (This creature can attack, and as soon as it comes under your control.). Sacrifice them at the beginning of the next end step. Activate only as a sorcery.)