# Immortality Body Structure

This report decodes one layer deeper than the literal scan for the surviving EVENT and NPCTRIG frontier.
It is still heuristic: the output is limited to repeatable byte grammar, subheader boundaries, field-tag trailers, and motif offsets that can be cross-checked against the 000d slot-backed runtime lane.

## EVENT slot `0x0A`

- Body length: `8150` bytes.
- Open header: `0x5A 0x2F 0x5C 0x1EF5` -> `EVENT` with embedded event-code byte `0x11`.
- Clause terminators (`0x7A`): `3`; local labels (`0x5B`): `383`.
- Internal labeled subheaders (`0x53 0x5C <u16> EVENT`): `90` -> `0x0088->0x1E6E`, `0x00F8->0x1DFE`, `0x0123->0x1DD3`, `0x0149->0x1DAD`, `0x0174->0x1D82`, `0x01CC->0x1D2A`, `0x0210->0x1CE6`, `0x0236->0x1CC0`, `0x0261->0x1C95`, `0x028E->0x1C68`, `0x02B9->0x1C3D`, `0x0361->0x1B95`.
- Tail field tags: `69:0000->referent`, `69:000A->event`, `24:02FE->item`, `69:6574->m`, `24:02FC->source`, `24:02FA->dest`, `24:02F8->door`, `24:05F3->wp`, `69:00F1->counter`, `69:00EF->counter2`, `24:02ED->n`, `69:00EB->link`, `69:00E9->cx`, `69:00E7->cy`, `69:00E5->ex`, `69:00E3->ey`, `69:00E1->time`, `69:00DF->op`, `69:00DD->opp`, `24:02DB->post1`, `24:02D9->post2`, `24:02D7->floor`, `69:00D5->dir`, `69:00D3->qHi`, `24:02D1->flicMan`, `69:4D63->an`.

| Motif | Count | First Offsets |
|---|---:|---|
| `call_40_06_4c_02` | 47 | `0x0011,0x010F,0x0160,0x024D,0x02A5,0x034D,0x0396,0x03F2,0x0422,0x047C,...` |
| `call_40_06_0f_04` | 50 | `0x001A,0x003C,0x0045,0x00C6,0x00D4,0x01EB,0x01F4,0x032D,0x0374,0x03D2,...` |
| `subheader_53_5c` | 90 | `0x0088,0x00F8,0x0123,0x0149,0x0174,0x01CC,0x0210,0x0236,0x0261,0x028E,...` |
| `writeback_57_02` | 44 | `0x007A,0x00EA,0x013B,0x01BE,0x0228,0x068F,0x0708,0x0799,0x08EA,0x0949,...` |
| `branch_59_0a` | 61 | `0x0072,0x00E2,0x0108,0x0133,0x0159,0x01B6,0x0220,0x0246,0x029E,0x0346,...` |
| `branch_3f_0a` | 39 | `0x0025,0x0057,0x019B,0x0271,0x02D4,0x02EE,0x0308,0x0322,0x03C7,0x045E,...` |
| `field_4b_fe_0f` | 23 | `0x0408,0x0412,0x0439,0x044D,0x0493,0x04A3,0x04EF,0x04FF,0x055E,0x0587,...` |
| `field_4b_fc_0f` | 3 | `0x0569,0x0575,0x057E` |
| `push_24_51` | 51 | `0x0029,0x005B,0x019F,0x0275,0x02D8,0x02F2,0x030C,0x0326,0x033F,0x03CB,...` |
| `event_field_69_0a_00` | 1 | `0x1F09` |

## NPCTRIG slot `0x0A`

- Body length: `373` bytes.
- Open header: `0x5A 0x06 0x5C 0x013E` -> `NPCTRIG` with embedded event-code byte `0x11`.
- Clause terminators (`0x7A`): `1`; local labels (`0x5B`): `12`.
- Internal labeled subheaders (`0x53 0x5C <u16> NPCTRIG`): `5` -> `0x0064->0x00DB`, `0x0093->0x00AC`, `0x00C2->0x007D`, `0x00F1->0x004E`, `0x0120->0x001F`.
- Tail field tags: `69:0000->referent`, `69:000A->event`, `24:02FE->item`, `69:6574->m`, `24:02FC->item2`, `69:6574->m2`, `24:02FA->n`.

| Motif | Count | First Offsets |
|---|---:|---|
| `call_40_06_4c_02` | 1 | `0x0011` |
| `call_40_06_0f_04` | 1 | `0x001D` |
| `subheader_53_5c` | 5 | `0x0064,0x0093,0x00C2,0x00F1,0x0120` |
| `writeback_57_02` | 5 | `0x0056,0x0085,0x00B4,0x00E3,0x0112` |
| `branch_59_0a` | 0 | `-` |
| `branch_3f_0a` | 5 | `0x0045,0x0074,0x00A3,0x00D2,0x0101` |
| `field_4b_fe_0f` | 0 | `-` |
| `field_4b_fc_0f` | 0 | `-` |
| `push_24_51` | 5 | `0x0049,0x0078,0x00A7,0x00D6,0x0105` |
| `event_field_69_0a_00` | 1 | `0x0152` |

## NPCTRIG slot `0x20`

- Body length: `345` bytes.
- Open header: `0x5A 0x06 0x5C 0x0120` -> `NPCTRIG` with embedded event-code byte `0x01`.
- Clause terminators (`0x7A`): `1`; local labels (`0x5B`): `19`.
- Internal labeled subheaders (`0x53 0x5C <u16> NPCTRIG`): `1` -> `0x00BA->0x0067`.
- Tail field tags: `69:0000->referent`, `69:000A->typeNpc`, `24:02FE->n`, `24:02FC->item`, `69:6574->m`, `24:02FA->item2`, `69:6574->m2`.

| Motif | Count | First Offsets |
|---|---:|---|
| `call_40_06_4c_02` | 2 | `0x0011,0x002C` |
| `call_40_06_0f_04` | 3 | `0x0085,0x008E,0x0097` |
| `subheader_53_5c` | 1 | `0x00BA` |
| `writeback_57_02` | 0 | `-` |
| `branch_59_0a` | 0 | `-` |
| `branch_3f_0a` | 1 | `0x0051` |
| `field_4b_fe_0f` | 10 | `0x0053,0x0060,0x006D,0x007A,0x00A0,0x00CC,0x00D9,0x00E6,0x0107,0x0119` |
| `field_4b_fc_0f` | 0 | `-` |
| `push_24_51` | 0 | `-` |
| `event_field_69_0a_00` | 1 | `0x0134` |

## Current Read

- `EVENT 0x0A` is the generic hub-shaped body: it has `90` internal labeled subheaders and the widest field trailer (`69:0000->referent, 69:000A->event, 24:02FE->item, 69:6574->m, 24:02FC->source, 24:02FA->dest, 24:02F8->door, 24:05F3->wp, 69:00F1->counter, 69:00EF->counter2, 24:02ED->n, 69:00EB->link, 69:00E9->cx, 69:00E7->cy, 69:00E5->ex, 69:00E3->ey, 69:00E1->time, 69:00DF->op, 69:00DD->opp, 24:02DB->post1, 24:02D9->post2, 24:02D7->floor, 69:00D5->dir, 69:00D3->qHi, 24:02D1->flicMan, 69:4D63->an`).
- `NPCTRIG 0x0A` is the compact player-trigger candidate: it reuses the same class-labelled open header and subheader grammar, but it stays constrained to `69:0000->referent, 69:000A->event, 24:02FE->item, 69:6574->m, 24:02FC->item2, 69:6574->m2, 24:02FA->n` instead of the wider EVENT field set.
- `NPCTRIG 0x20` keeps the same constrained field set as `NPCTRIG 0x0A` and changes only the embedded prolog event-code byte (`0x01` vs `0x11`), which fits a variant trigger/setup lane better than a separate generic hub.
- The repeated `0x53 0x5C <u16> LABEL` subheaders and dense `0x5B <u16>` local labels make these bodies look like inline clause streams rather than single flat payloads, which is consistent with the `000d:21ed -> 000d:22bc` runtime lane that copies variable-length inline bytes first and only then consumes compact metadata bytes plus streamed words.
- The surviving slot focus is still `0x0A`: both EVENT and NPCTRIG expose non-zero slot-`0x0A` bodies, and the runtime side has an exact offset-specialized masked wrapper for slot `0x0A` at `0005:2c35` (`entity_vm_context_try_create_mask_0400_slot0a_with_offset`).