The elf is going to find a room to start carving symbols into the floor in order to make wards for himself 'cause you people, he don't know you people and want to have a place to hide himself in. But his wards have to have like rules to them -- like you have to be of high magical talent to cross. Blah blah. Also, they're fairly weak and need a power source. Once the source is made, there goes some of his magic which weakens him. In short, double-edge sword. When the source is destroyed, it does not come back to Yaha. He has to sit around and replenish his MP all on his lonesome and be sad that his spell was broken.

As for what he lusts for... blood, presently.