While exploring The Risen Lake, you came across another rift in time that brought you forward in time and what was once the beautiful lake is now filled with corruption. At the Corrupted Lake, you came across what appeared to be a sacrificial pit and the Prophet of Ruin wanted to make you the next sacrifice in his dark ritual. Your fight with the Prophet drew the attention of a massive Void creature known as the Idol of Ruin. You managed to escape from the creature and return in time.