Hi there! This post showed up on my LJ homepage, because I visited your journal to read your open_on_sunday drabble. I hope you don't mind me adding my 2 cents:)

Giles could play on Xander's insecurity, and his crush on Buffy. He could point out Xander's weakness relative to Buffy, and lead Xander down a dark path by offering him access to powers available through dark magic and/or making deals with demons.