Bane's Heart (crystal)

Bane's Heart was a unique pink lightsaber crystal held by N-K "Necrosis" during the Galactic Civil War. When tuned to be used in a lightsaber, it caused that lightsaber to deal heat damage and meant that it could be used by no other user.

Behind the Scenes
Bane's Heart was most probably named after the legendary Sith Lord Darth Bane.