Honkai Star Rail: Difficulty V Interplanar Jump and Furbobo Treasure in Desolate Maw’s Demonhold

Desolate Maw’s Demonhold holds twelve Interplanar Jump puzzles, and only one of them is rated Difficulty V. That stage is Interplanar Jump 5, a 2D platformer built around a gravity-flip mechanic and a field of lightning strikes. Clearing it also lets you pick up its Nameless Wispae, which is the piece most players miss when they think they have finished the Furbobo Treasure.

Quick answer: Enter the Difficulty V portal, keep moving left, and use the gravity line to flip between floor and ceiling so the lightning strikes miss you. Grab the Nameless Wispae before you exit, then take the treasure chest at the end to complete the stage.

Where the Difficulty V Interplanar Jump is

Interplanar Jumps are pixelated portals scattered around Planarcadia’s maps. You walk up to one, press F, and drop into a short side-scrolling minigame where you collect Pixcoins and reach the exit. Each portal shows its difficulty on the label, so the Difficulty V stage in this region reads “Interplanar Jump! Difficulty V” when you approach it.

Detail	Value
Region	Desolate Maw’s Demonhold
Stage	Interplanar Jump 5
Difficulty	V (5)
Main hazard	Lightning strikes from floor and ceiling
Core mechanic	Gravity line that flips your character
Collectible	Nameless Wispae + treasure chest

Note: this is the only Difficulty V jump in Desolate Maw’s Demonhold. The region’s other eleven jumps sit at Difficulty 1, 2, 3, 4, and even one Difficulty 10, so don’t confuse this stage with the harder Interplanar Jump 11.

How to clear Interplanar Jump 5

Walk up to the Difficulty V portal and press F to enter. The minigame loads with your raccoon character on the right side of the stage.

Move left and keep heading that way. The whole stage runs to the left, so your goal is a steady push toward that edge while collecting coins along the route.

Watch for the lightning that rains down periodically. Stand on the gravity line to flip yourself to the ceiling and back, so a falling bolt passes through empty space instead of your character.

Time each flip carefully, because the ceiling also gets its own lightning strikes. Switch only when both the floor and the ceiling are clear at your position, then move on before the next volley lands.

Grab the Nameless Wispae in the stage before you reach the exit. Once you have it, finish the run to trigger the Challenge Complete prompt and open the treasure chest for Stellar Jade, Adventure Log, and Arcadian Tokens.

The Nameless Wispae and the Furbobo Treasure

The Nameless Wispae is the reason a “cleared” jump can still read as incomplete. When a stage lists a Furbobo Treasure, it usually means a Nameless Wispae is hidden inside that same jump, and you need to collect it for full credit. Reaching the exit alone is not enough. You have to physically grab the Wispae during the run.

You know it worked when the stage marks as fully cleared and the region tracker ticks the Furbobo Treasure as collected. If the jump still shows a partial percentage after you exit, you almost certainly skipped the Wispae and should re-enter to pick it up.

If the Furbobo Treasure won’t register

A known bug can leave a jump stuck at around 90% cleared even after you collect everything inside, including the Furbobo. The Wispae disappears from the stage, but the completion credit never lands. Two things reliably fix it.

Restart the game. After a fresh launch, the missing Furbobo often gets credited automatically.
Collect the region’s other Furbobo treasures. Finishing the remaining ones can retroactively mark the stuck one as complete.

If neither works right away, the count usually corrects itself within a day, so avoid re-running the stage in a panic. Once the tracker shows the Furbobo Treasure claimed and the jump at full completion, Interplanar Jump 5 in Desolate Maw’s Demonhold is done and you can move on to the region’s remaining chests and jumps.