Catalyst Counterpart

{t}, Sacrifice another creature: Target opponent loses 2 life. If the sacrificed creature was named Catalyst Counterpart, draw a card.
Reunite {4}{b} (If this card is in your graveyard and you control a creature with the same name as this, you may cast this card from your graveyard for its reunite cost.)
"My sister's a glutton for punishment. She always comes back for more!"