Well, you may have been expecting many different things, but we are pretty sure this was not one of them. Every time you attacked a Pyrkari Adversary, a Farclan Technician would appear out of nowhere, fiddle with some little gizmo he was holding, and suck the Pyrkari, or their essence, into a little cannister.
So you decided to see what would happen if you attacked a bigger Pyrkari, such as a Pyrkari Lieutenant. Click on the Pyrkari Altar to call him.
Aha! The Farclan have been using these Pyrkari Essences as the motive force in their Malgem Cores!
Borrin is none too please about this. He asks you to go speak to his agent, Harold Genthrop, and then confront Queen Solya Karini at Farhall.