Magical ichor

Magical ichor, also known as magickal ichor, or spirit ichor, was a luminescent green mist that originated in the depths of Dathomir. The Nightsisters, an all-female order, knew how to summon that ichor through their magicks and use it to create physical objects out of the ether.

Magical ichor could be manipulated by shamans such as Nightsister Mother Talzin. Talzin was able to use ichor to create a goblet of blackroot. Soaking a kyber crystal in the ichor perverted its connection to the Force, and create a Tainted Nightsister Crystal. These crystals, if used in a lightsaber-like weapon, emitted a green smoke when active. Talzin was able to produce a sword out of ichor that she used to duel Jedi Master Mace Windu.