The Corrupted Lake quest in Last Epoch is a key mission encountered during the Imperial Era campaign, specifically in the fourth chapter titled The Outcasts and the Empire. To begin this quest, players must travel to The Risen Lake area by following waypoints through Walryn Outskirts Last Epoch Gold, Imperial Welryn, and The Soul Warden’s Road. Near the waypoint in The Risen Lake, there is a Time Rift that teleports players to an alternate, corrupted version of the lake called The Corrupted Lake, set in the Ruined Era.

Once inside The Corrupted Lake, the main objective is to defeat two powerful bosses: the Prophet of Ruin and the Idol of Ruin. These enemies are central to the quest’s progression. Players are advised to avoid standing in the large purple circles on the ground during these fights, as they deal heavy damage. Defeating both bosses rewards the player with a Passive Skill Point and two additional Idol Slots, which are valuable for character customization and progression.

The area itself is dangerous and filled with hostile creatures, requiring careful exploration and combat readiness. The easiest path to reach the bosses is to start by hugging the left side of the map and then following the right wall to navigate through the zone efficiently. After completing the boss fights, players return to The Risen Lake to continue the campaign.

Following the quest, players can proceed to the Outcast Hideout by lowering a bridge near a stone and interacting with the Outcast Seer. This triggers a defense mission where players must protect the Seer from waves of undead enemies. The questline then continues westward through other campaign areas such as Thetima and Harton’s Dreadnought.

The Corrupted Lake quest is notable for its blend of exploration, combat, and strategic boss fights, making it a memorable and challenging part of the Last Epoch campaign. It also provides important rewards that aid in character development and unlock new gameplay options.

If you're stuck, be sure to explore thoroughly, avoid dangerous ground effects during boss fights, and prepare for waves of enemies when protecting the Outcast Seer buy Last Epoch Gold. This quest is a crucial step in advancing the story and unlocking further areas in the game.