Board Thread:False Info and Speculative Discussion/@comment-26421504-20150615191346/@comment-24989948-20150617005441

Regarding the part of Stiles working the mountain ash:  Deaton said everyone has a spark, not Stiles specifically. I'm a bit tired to research that comment. It is an aspect of the program never touched on after the one time.

At the beginning of season 3a, Allison broke the circle trapping Scott and Derek.

Considering the level of training revealed during the sneak peek for Lydia, within the realm of probability, Stiles could be training with Deaton. Again, only a possibility.