SONG GUIDE · ULT 10 SIGHTREAD
yggthrasir — ULT 10
ARC 3: HEAVEN'S CHAINS · IKARUGA_NEX · RANK AA CLEAR
yggthrasir is one of the eight Arc 3: Heaven's Chains tracks — ikaruga_nex's contribution to the chapter, cataloged at ULT 10 with an FBD 12 top tier. This page walks the chart through TrappyTheDemon's verified ULT 10 sightread that ends DIVE CLEARED at rank AA. The FBD 12 capture isn't verified yet, so every figure below describes the ULTIMATE 10 chart — the levels table still lists its FBD ceiling from the song database.
TL;DR
- ▸yggthrasir is an ikaruga_nex track in Arc 3: Heaven's Chains (v1.0.2c): MIN 3, EVO 6, ULT 10, FBD 12 — documented one level under the game's highest FBD ceiling.
- ▸The ULT 10 chart starts holding immediately: a violet beam pins the A lane within the first bars, and the signature split — violet left, red right — arrives around the upload's halfway mark.
- ▸Clearing tolerates mistakes: the source sightread counted 36 BREAKs against a MAX LINK of 285 and still finished DIVE CLEARED at rank AA.
- ▸Every figure deep-links the creator's upload at the shown moment; the run's final score, 095'548'916, is readable on the result screen.
SOURCE FOOTAGE
Every frame on this page comes from TrappyTheDemon's yggthrasir ULT 10 sightread (3:05): a full-screen chart capture with no handcam, no facecam and no commentary overlays. The upload records one continuous run — it opens already in the dive and rides straight through DIVE CLEARED to the result screen — so the page can quote the whole attempt honestly. The upload carries no captions; each fact below was read off a frame that was opened and checked individually.
The source video is VFR (variable frame rate), so deep-link seconds can land a second or two off the exact frame — the stills on this page were verified one by one against the upload.
THE CHART AT A GLANCE
CATALOG DATA · v1.0.2cyggthrasir's catalog entry, straight from the site's song database (community-wiki data, game version 1.0.2c). Levels are documented for all four tiers; the footage on this page covers the ULTIMATE 10 chart.
| Song | yggthrasir |
|---|---|
| Artist | ikaruga_nex |
| Arc | Arc 3: Heaven's Chains |
| Game version | 1.0.2c |
| Levels — MIN / EVO / ULT / FBD | MIN 3 · EVO 6 · ULT 10 · FBD 12 |
→ Arc 3 Guide→ In Falsus Song List — All 70 Tracks with Chart Levels
HOW TO READ THE CHART
8 FRAMES · TRAPPYTHEDEMON SIGHTREADEight frames, one lesson each: how the chart opens, where it asks your hands to split, where the beams travel, and what a sightread can still get away with. Timestamps quote the source video at the shown moment.
- 1
No warm-up: holds from the first bars
The video opens mid-dive and the chart starts working immediately: inside the first bars a violet hold beam pins the A lane, a hex-shaped hold outline waits on the D key, and the combo counter is only at 10. The opening feeds steadily rather than exploding — read the lanes early instead of reacting at the judgement line.

ULT 10 SIGHTREAD · 0:15 OPENING · Footage: TrappyTheDemon ↗ - 2
A wide hold parks on the left
Half a minute in, the chart lays a wide violet hold beam across the left lanes and keeps pressure running elsewhere — the frame catches combo 132 intact while a yellow wedge note slides toward the line. This is the song's core idea: something always needs holding down while the other hand travels.

ULT 10 SIGHTREAD · 0:47 WIDE HOLD · Footage: TrappyTheDemon ↗ - 3
The signature split: violet left, red right
Around the upload's halfway mark both halves of the field light up at once — a violet beam owns the left lanes while a red beam sweeps in from the right, and the violet hold visibly steps across the center lanes as it ends. At combo 80 this is the widest read so far: assign one beam per hand and stop thinking in single lanes.

ULT 10 SIGHTREAD · 1:22 DUAL BEAMS · Footage: TrappyTheDemon ↗ - 4
The beams switch sides
The mirror arrives quickly: the violet beam now travels down the right half while hold sparks keep firing on the A and S lanes underneath. The sightread's combo had already taken damage by here — 46 and climbing in the frame — and rebuilding it while tracking the crossing beams is exactly what chews up first attempts.

ULT 10 SIGHTREAD · 1:34 SIDE SWAP · Footage: TrappyTheDemon ↗ - 5
A near screen-wide beam
Later still, a violet beam stretches across almost the entire field, its head landing on the judgement line as a spark burst fires on the F lane. The combo counter in this frame reads 20 — the run had just taken its damage — so treat full-width shapes as recovery checkpoints: hold the beam and let the streams re-form behind it.

ULT 10 SIGHTREAD · 1:58 FULL-WIDTH BEAM · Footage: TrappyTheDemon ↗ - 6
The final stretch: red sweep over violet holds
The last tens of seconds stack a red beam across the right half beside a violet-edged hold, with EXACT judgements landing in pairs. The score reads 091'357'022 with the song nearly over — whatever the gauge still owes gets paid here; there is no chart after this section.

ULT 10 SIGHTREAD · 2:40 FINAL STRETCH · Footage: TrappyTheDemon ↗ - 7
DIVE CLEARED
The banner lands over an empty field: the sightread cleared in a single run. ULT 10 is demanding to full-combo but forgiving to survive — breaks cost combo and gauge, not the dive itself.

ULT 10 SIGHTREAD · 2:50 CLEARED · Footage: TrappyTheDemon ↗ - 8
Read the result screen
The result confirms the picture: rank AA, score 095'548'916, MAX LINK 285, and the judgement rows — 1212 + 113 EXACT, 54 NEAR, 36 BREAK, 1,415 notes in total — with the MISS GAUGE readout at 14. A sightread that broke 36 notes still finishes at AA, which tells you where the grading pressure sits: combo runs, not survival.

ULT 10 SIGHTREAD · 3:01 RESULT · Footage: TrappyTheDemon ↗
YGGTHRASIR FAQ
SEARCH INTENT · ANSWEREDHow do you unlock yggthrasir in In Falsus?
yggthrasir belongs to the Arc 3: Heaven's Chains chapter, and its tracks unlock through the scenario — advance Act 3 and the chapter's songs join the catalog as story nodes clear. There is no separate purchase.
Is this guide for ULT 10 or FBD 12?
For ULT 10 — honestly. The verified footage on this page is TrappyTheDemon's ULTIMATE 10 sightread. yggthrasir's FBD 12 chart is documented in the song database but has no verified capture here yet, so nothing above describes the FBD pattern itself.
How hard is yggthrasir FBD 12?
Level 12 sits one step below the game's highest documented FBD ceiling of 13, a mark shared by several other cataloged tracks (site song database, v1.0.2c). Expect the split-beam and hold ideas of the ULT chart delivered at FBD density — and treat that as expectation, not a verified capture.
Who made yggthrasir, and which arc is it in?
yggthrasir is by ikaruga_nex and belongs to Arc 3: Heaven's Chains, documented at game version 1.0.2c. The chapter's full track group and walkthrough are covered in the site's Arc 3 guide.
How does yggthrasir compare with Vesper?
Both are Arc 3: Heaven's Chains tracks documented at ULT 10, and both lean on split beams — one hand holds while the other travels. The database lists Vesper's ceiling at FBD 13 and yggthrasir's at FBD 12, so yggthrasir tops out one level lower. Both walkthroughs on this site use the same TrappyTheDemon sightread format.