The Ever Fiend - Talon Stormbringer, #1

Only a fool steals from a wizard. Talon Stormbringer thought he knew the risk of stealing from Viland Shadowbreaker - until he got caught. The wizard will spare him if Talon fetches the deadly silver elixir from the Everway, a supernatural land of lost souls and worse, ruled by the Ever Fiend. Talon had assumed none of it was real but agrees to go despite a band of people he can't trust accompanying him.
Of all the things they might discover on their journey, one is the hardest to learn... Only a fool steals from the Ever Fiend.