Short Answer

Keeper of Flaming Mountains is the Emerald Hall boss that calls in Yin-Yang Fish near the end of the fight. Beat the Keeper by watching homing projectiles and clearing archers first, then slow down for the fish: respect tail slaps, run through aerial projectile barrages, and punish the howl window.

Route And Unlock Context

This fight starts at Furnace Valley, The Emerald Hall. From the shrine, climb the stairs to the top and enter the cutscene route. The encounter is required for Chapter 5 progression.

The fight has two distinct parts. The Keeper controls the first section from range and through summoned lesser yaoguais. When the Keeper is near defeat, it hides and sends out Yin-Yang Fish. You must defeat the fish to finish the encounter.

Fight Plan

Against the Keeper, do not tunnel on the boss while arrows are landing. The homing projectiles can curve back after an initial dodge, so keep moving and watch for delayed returns. When lesser yaoguais appear, kill archers first because they interrupt your attempts to handle melee enemies or heal.

The Keeper itself is frailer than the arena pressure suggests. Once the adds are under control, use heavy attacks and short burst windows to push the fight forward.

Yin-Yang Fish changes the rhythm. If you attack the tail, be ready for a fast slap after the fish tilts toward you. When it rises and fires a barrage, keep running and rolling until the whole sequence ends; one hit can chain into more. The best punish is the howl, where the fish pauses long enough for a real combo or spell burst.

Moves To Respect

  • Homing projectiles: dodge, then keep tracking them because they can return from another angle.
  • Summoned archers: clear them before melee adds so the arena becomes readable.
  • Tail slap: if the fish tilts toward you while you are at the tail, leave immediately.
  • Aerial barrage: run and roll until the projectile sequence is finished.
  • Howl pause: this is the safest fish punish window.

Use Cloud Step for projectile recovery, Immobilize for burst windows, and a Spirit that lands quickly. A Pluck of Many is strongest after the Keeper’s adds are cleared or during a fish howl; casting while archers are active can waste the spell.

Keep a stamina-friendly setup. This fight asks for repeated dodging and repositioning, especially during the fish’s projectile barrage.

Common Mistakes

  • Ignoring archers while trying to damage the Keeper.
  • Dodging the first projectile and stopping before it finishes tracking.
  • Attacking the fish tail without watching for the head tilt.
  • Missing the fish howl because you are too far away after the barrage.

Quality Check Before You Move On

You are ready to continue when both the Keeper and Yin-Yang Fish are defeated, the armor materials are collected, and the Yin-Yang Daoist Robe reward has been checked.

FAQ

Is Yin-Yang Fish a separate boss?

It is the second part of the Keeper encounter. The Keeper hides while the fish fights, and the encounter ends after the fish goes down.

What should I target first when adds spawn?

Kill archers first. Their ranged pressure makes every other action less safe.

When is it safe to attack Yin-Yang Fish?

The howl is the cleanest window. Tail attacks can work, but only if you are ready to dodge the fast tail slap.

Sources