Singularium

Singularium is the single most powerful substance in the known Galaxy, more than 20,000,000,000 times the energy of antimatter. It can only be found in the Artexian system, and even so, can be mined in micrograms at a time.

Singularium was the key ingredient in creating Solar Bombs, due to its nature of generating energy that binds with its molecular structure. It is slightly unstable, for physical impactaion can cause the Singularium to release microscopic amounts of energy (in this case, half a gram hitting a wall will cave it in).

Artificial creation of Singularium has been attempted, but has ended with complete failure, as the chemical composition can only be accomplished in Subspace, where physics mean nothing. Unfortunately, anything non-indiginous to Subspace will cease to exist.