Dragonlance - Tanis, the Shadow Years (Preludes II #3)

The tale is told that Tanis Half-Elven once disappeared in the mountains near Solace. He returned changed, ennobled and with a secret. No one knew what happened to him in those mist-schrouded peaks...until now.

The adventure began with a dying wizard who needed Tanis's help. It would not end until Tanis became a traveler in the old mage's memory, journeying into the past to fight an impossible battle against time itself.