History of Seal Their Doom

Overview

Seal Their Doom is a Festival of the Lost challenge for purchasing eight defenses with Treats in Haunted Altars of Sorrow. It rewards an Event Token.

How to complete

During the original event activity, defeat enemies and collect their dropped Treats, then deposit them at the central altar with Sir Skullduggery. After a wave is cleared, use the defense-building interval to purchase the available turrets or laser tripwires with banked Treats.

Make eight qualifying purchases. Merely collecting or banking Treats is separate from buying defenses. Place defenses along the active enemy approach lanes to help subsequent waves. Festival of the Lost retired in June 2026, so this original event challenge route is no longer available.