A descending brass figure over a deep choral swell states the opening motif; percussion joins around 0:10, the rock beat lands near 0:15, and the rhythm-guitar riff with answering brass stabs owns the floor by 0:24–0:29. The orchestral-rock hybrid is the stated contract from here on.

A held pause and a hard hit at 0:33 fracture the intro. An organ line then leads over driving drums, climbing toward a peak around 0:43 before rolling drums scatter it. The section delays — the intro breaks apart and reassembles larger.

The full ensemble falls away into a pulsing synth figure, then near-ambient pads by about 1:03. Quiet percussion re-enters around 1:12, and the choir's first soft singing surfaces near 1:15. The emptying is what makes the voice register as an entrance.

The choir chants Estuans interius, ira vehementi, capped by the name Sephiroth at 1:22 and 1:26. The same cycle repeats with more drive at 1:30 as weight gathers beneath it. The Sors immanis, et inanis couplet narrows the color at 1:46 before the Estuans material returns at 2:02 and closes on Sephiroth again — repetition doing the work of proving the chant.

The choir drops out after the 2:15 close, and an instrumental bridge is in place by around 2:24: a soaring melodic lead riding a galloping beat. Around 2:58, organ and choir re-enter as a restored mass, thickening the bridge before a rebuild starting near 3:24 points toward the later lyric chant block.

Veni, veni, venias returns the choir at a quicker patter, each line answered by ne me mori facias, with the gloriosa and generosa counters stacking on top from 3:52. Sephiroth returns at 4:08 and 4:11, a final weight lands around 4:14, and everything stops abruptly near 4:20 — one last Sephiroth sounds at 4:22 in near-silence before the track ends.

The whole form runs on accumulation interrupted by subtraction: build, break, empty, rebuild, and finally stop rather than settle.