Zirconiade
Zirconiade is the Final Boss of Before Crisis -Final Fantasy VII-. A so-called "Ultimate Summon", Zirconiade's materia was shattered into pieces some time ago. The four pieces of the Materia were assembled by AVALANCHE's demented scientist and former apprentice to Bugenhagen, Fuhito, who used them to merge with Zirconiade in order to facilitate his plan to wipe out all life in the world and thus all threats to it.
I shall insert the Materia required to make Zirconiade whole into my own body and give it up in offering.