Stiles didn't choose to give his life to the unicorns, not really; they were the ones who chose him. He didn't understand, then, what it was they were taking from him.

Derek is only too aware of his destiny - choose a calling, ascend to the pantheon of gods that the rest of his family is a part of. Trouble is, though, he can't seem to decide where to focus his strengths, shies away from the power and responsibility thrust upon him and prefers to escape and to watch the progress of humanity throughout time. He feels a bigger affinity with the humans than with his own kind, and revels in watching the fragile, mortal creatures he loves so much embody all the traits he holds dear. It's a passing hobby, that is, until he catches a glimpse of someone who demands his attention like no other.