Evil Black Crystal
Opening the Dark Gate
Act 18-Invasion, Sailor Venus (second anime)
In the DiC English dub, this crystalline substance was called "the Dark Crystal," in the Tokyo-pop manga translations it was called "the Black Poison Crystal."
In the second season, the Evil Black Crystal was in the very heart of planet Nemesis powered by a reactor that greatly strengthened its evil. Wiseman had a large orbicular fragment of it which he used against Sailor Moon (as Neo Queen Serenity) and Chibiusa's Silver Crystals. The Crystal also acted as a key to open the Dark Gate. Black Lady attempted to fully harness and channel its vast amounts of dark energy into herself to obliterate the Earth.
The Evil Black Crystal plays a similar role it had in the original anime. Wiseman said that the crystal rivaled even the supremely powerful abilities of the Silver Crystal itself and it possessed the power to dominate everything.
As a crystallized stone of pure evil, it has complete power over the element of darkness and is capable of projecting supremely strong and destructive bursts of evil energy, leaving destruction and decay in its wake. It also has the ability render anything or anyone directly linked with the Silver Crystal itself utterly defenseless and powerless.