After you confront Thousandfold Piercer in Chrono Odyssey, several side quests open up throughout the whole world. If you're looking for a miniboss to fight and farm in its nook, the Abyssal Fiend is the best option early on. This is a quest that you can pick up from the quartermaster at Coastal Outpost.
If you're wondering how to complete the quest, this Chrono Odyssey guide is for you.
Note: This guide was written during the Chrono Odyssey playtest in June 2025, so things may change in the full release.
Where is the Abyssal Fiend in Chrono Odyssey?

Abyssal Fiend functions exactly as a bounty in Chrono Odyssey, except it never pops up on the Dawn Slope bounty board. Once you acquire this quest, take the same path left of the Coastal Outpost that leads to the Dawn Slope hub area. However, instead of following the path all the way, take a left turn to the ruins (it's labelled Dawnslope Ruins on the map).
Follow the objective pointer, and you'll eventually reach a gate to the right, blocked by broken pillars. You can climb these pillars to enter through the crevice. After this, you must go prone to slip under the iron grills.

Inside, it's the arena for Gwalla the Abyssal Fiend. This is a beaver-like creature that has an easy-to-dodge bite attack as a melee, along with two moves you must look out for:
- It can burrow into the ground. At this point, stay alert, as it will track you and pop back up at your position. If you have a guard or damage mitigation ability, now is the time to use it. Abyssal Fiend also tends to do this move twice in a row.
- It will roll towards you like a pangolin. It's possible to sidestep it, as the animation has a very obvious wind-up.
If you don't find the Abyssal Fiend in the room, it means someone else has recently slain it. Just wait up to 30 seconds for it to respawn.

Also Read: How to get a horse in Chrono Odyssey
The Abyssal Fiend is worthwhile not due to the quest rewards, but for the gear it can drop. It can drop any gear piece from the Order Warden heavy armor set with an Equipment score of up to 10, which is pretty good for the early game. Other than that, it can drop some cooked dishes and Ember Hearts, a legendary crafting material.
There's also an Ancient Mimic in the same room. This respawns like the Abyssal Fiend, so you can farm it for Ancient Mimic Coins. However, it's best not to aggro both at the same time.
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