These pale green spectres haunt Camp Theod.

They look vaguely Elven with sullen features.
The area around Camp Theod used to be controlled by the Elves, and Zirris was their king.
Zirris was a silver Dragon king
Elves in this region worshipped Eranil, goddess of starlight.
The wail "Return to us the head of King Zirris".
They were laid to rest when the party burried Zirris' skull in his tomb.

References

Sessions