To complete Isagi’s Egoist Trial 2 puzzle in Universal Tower Defense, collect all four hidden lobby pieces by checking behind NPCs, the subway area, and a building roof before starting the trial.
The hunt is short, but it is easy to overshoot a piece if you run straight between quest markers. Use the checklist to identify your missing pickup, then follow the route sections for the areas that need a tighter sweep.
All four Isagi puzzle pieces
| Puzzle piece | Where to look |
|---|---|
| Puzzle Piece 1 | Behind one of the lobby NPCs |
| Puzzle Piece 2 | Behind another NPC in the lobby |
| Puzzle Piece 3 | In the subway area |
| Puzzle Piece 4 | On a building roof in the lobby |
Treat this as a lobby route rather than a coordinate list: check the NPC spots first, then sweep the subway area and the building roof. The last checks are close enough that a slow sweep is better than teleporting away and coming back later.
Before searching for Isagi pieces
The Isagi puzzle pieces are lobby and event-area pickups tied to the current Blue Lock/Isagi content. They are not normal stage drops, so running regular stages will not move this part of The Egoist Trial 2 forward.
Keep a manual count as each piece disappears so you know whether your missing pickup is behind an NPC, in the subway area, or on the building roof.
Puzzle Piece 2 behind a lobby NPC
Check the lobby NPCs
Move through the lobby and look behind the NPCs placed around the hub.
Look behind the NPC
Check the space directly behind the NPC instead of only scanning the front side.
Collect Puzzle Piece 2
Grab the second puzzle piece from the NPC-side spot before sweeping the subway area.
Puzzle Piece 3 near the subway
Go to the subway area
Move into the nearby subway section of the lobby.
Sweep the subway space
Check around that subway area instead of looking for a single precise prop.
Collect Puzzle Piece 3
Pick up the third piece once it appears in the subway-area sweep.
Puzzle Piece 4 on a building roof
Head to the building
Return to the lobby building area after collecting the third piece.
Check the roof
Look on the building roof for the final hidden puzzle piece.
Collect Puzzle Piece 4
Grab it to complete the four-piece requirement for Isagi’s Egoist Trial 2.
After all four Isagi pieces are collected
KEY!Once the fourth piece is collected, go to the Isagi trial/quest and continue the The Egoist Trial 2 flow from there. The puzzle hunt is the event-area requirement that comes before progressing the Isagi trial content.
The pieces are part of the unlock path for Secret Isagi, so do not keep rechecking the lobby after the four-piece set is complete. Move on to the trial/quest prompt and finish the Isagi content from that point.
Missing Isagi puzzle piece checks
If a piece does not appear, restart into the updated client first. Current event pickups can fail to show properly when you are still running an older build, especially around limited-time event content.
After that, re-sweep the route by area: behind the lobby NPCs, the subway area, and the building roof. For pickups, get close to the piece and use the interact prompt if one appears instead of only checking from a distance.
Frequently Asked Questions
How many Isagi puzzle pieces are there?
There are four Isagi puzzle pieces to collect for this puzzle set in Universal Tower Defense.
Are the Isagi puzzle pieces inside stages or in the lobby?
They are lobby/event-area pickups, so farming story, challenge, or regular stages is not the way to find them.
Where is the first Isagi puzzle piece?
The first piece is behind one of the lobby NPCs.
What should I do after collecting all four puzzle pieces?
Go to the Isagi trial/quest and continue The Egoist Trial 2; the puzzle hunt is only the requirement before that part.
Why can I not find one of the puzzle pieces?
The usual misses are an outdated client, skipping the NPC-side spots, not checking the subway area, or not getting onto the building roof.
Video help
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