The newly released Coiled Captors DLC includes a new replayable dungeon, Mirrors of Mystery, which can also be accessed from the main game. At the end of the dungeon, players can repeatedly fight Chums, the Old God, and will get the chance to obtain the Legendary Ring, called the Lethal Catch.
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Chums is a giant shark-like boss that you will face at the end of the Mirror of Mystery dungeon. He is accompanied by several Seawargs and has a total of Four Forms. You need to kill all forms to defeat him.
Unlike the typical Seawargs throughout the game, Chums can send a giant wave of water and a charge and chomp attack that many of the enemies have.
Defeating Chums in All Forms
Originally, Chums’ four forms can be defeated by coming back every week from April 21 to May 12, but players have found a way to defeat all forms by playing without an internet connection.
After defeating Chums once, head to the Mirror of Mystery and you will discover that you can select a second difficulty. You then need to defeat all previous forms to reach the final 4th form.
When you finally reach the last form, survive in any way you can as Chums resets if you die in the dungeon right after killing him, taking away your loot. To activate infinite loot, carry a weapon that can down you and repeatedly defeat the boss.
Liquid Cooling is one of the highly recommended weapons for this boss fight.