It doesn't make sense for merchants to sell (or buy) those potions that drain health or anything else. Reminds me of an item I once made while DMing in a popular online MMORPG. I deliberately placed a brief stun spell on a pendant with self-cast. If you looked at the pendant, you knew it wasn't quite right. 
__________________ To the Righteous belong the fruits of violent victory. The rest of us will have to settle for warm friends, warm lovers, and a wink from a quietly supportive universe. |