Omeganium

Omeganium is a VERY VERY rare and precious material used to create the Omega Bloon, it is super though (about thrice as much as Ukura) and is full of energy. Only the Omega Bloon can drop these.

If you actually collect 100 Omeganium and put it in the Crafting Menu, you will be granted an Omega Gem whose effect currently can't be revealed...