Gurunium

Gurunium (グルニウム guruniumu) is a powerful energy ore, discovered by Doctor Minakaze.

Fiction

Victory manga

The gurunium was used to create Victory Leo's body, making him and Victory Saber powerful enough to merely laugh at being shot by the Living-Metal-Destroying Cannon. The Strongest Partners, the Combination of Victory!

Spacewarp's Log

The bugboy tribe of Inner Pellucidus stockpiled gurunium in their war against the Valkyrie tribe. However, the Valkyrie-aligned Cybertronians Chromia and Spacewarp intervened in the Moldavite war, bringing about a peace accord between the tribes. Chromia and Spacewarp proceeded to use the gurunium to trigger the opening of the passage between the inner and outer zones of Moldavite I in order to leave. Transformers: Spacewarp's Log