Isogen-5 is an exceedingly rare, extremely unstable variant of isogen found only in blue bright star (Type O1) systems. Its rarity is at a point that until recently it was half-believed to be only theoretical in nature. It glows very brightly.
Isogen-5 may have been used to fuel Jamyl Sarum's superweapon.
This mineral variant has been deliberately placed throughout every system in New Eden and beyond in numerous stockpiles for a very specific, unknown purpose by an ancient race with a vision beyond the grasp of modern science, and the technological advancement to execute that vision.