Infernal Darkness
From Starsonata Wiki
Infernal Darkness is a strange, darker version of its bright counterpart, Infernal Tempest. Hiding near its dark suns and nebulae are darkened versions of goblins and infernos, Dark Inferno/Dark Goblin, supported by a Dark Doom Inferno.
The warps to Dark Koboldstein's Lair, Dark Scorch's Hiding Place and Dark Maelstrom can be found here.
The only way to gain entry to Infernal Darkness is to continue the Earthforce missions until the warp is unlocked, hiding over the normal warp to Infernal Tempest. It seems to be balanced towards seers and other stealthy characters.