Board Thread:False Info and Speculative Discussion/@comment-24.236.33.123-20170919195030/@comment-4091815-20170919202858

Yellow Wolfsbane is a powerful poison to supernaturals. For Gerard though, it cured him of whatever illness he suffered after making Derek bite him at the end of Season 2.

If, as Kate threatened, the yellow wolfsbane is going into a bullet then it would kill Scott pretty quickly and effectively.