My research has revealed a unique purpose for the prismatic shell.$b$bCarry the shell and cast your polymorph spell on the Spitelash in Azshara.  If you wait a few moments, the chaotic aura of the shell will cause them to split into several smaller clones for a few moments.  Kill these clones as quickly as possible, and the shell will collect their essence.$b$bWhen the shell is full, return it to me.