The one he gave to Belle was fake. Rumple says he promised Neal that he would kill Zelena, and he never goes back on a promise. He stabs Zelena with the dagger, and she turns to glass and shatters on the ground.

Did Zelena die in Once Upon a Time?

Zelena made the ultimate sacrifice during Sunday's episode of Once Upon a Time — the Wicked Witch didn't technically die, but she did give up her magic. ... In an ultimate sacrifice, Zelena used the heart to absorb all her magic, including what was within the crystals, rendering them useless to the Black Fairy.

Who kills Zelena in Once Upon a Time?

'Once Upon A Time': Zelena Killed By Rumple — Season 3 Episode 20 Recap – Hollywood Life.