Thank Goodness You've Returned is an Achievement in Diablo 3: The Darkening of Tristram.
Description[edit]
Thank Goodness You've Returned is only available during the Diablo 3: The Darkening of Tristram event.
You will need to defeat the Butcher found on level 2, Skeleton King found in King Leoric's Tomb on Level 3, Archbishop Lazarus in the Unholy Altar, and Dark Lord on Level 16
Reward[edit]
Banner Sigil
Banner Accent