redraft: specify colosseum mechanics

Story/Worldbuilding.md

@@ -156,6 +156,8 @@ The entry ceremony uses **two distinct rooms** plus a **dreamscape void** betwee
 - **Pace:** exponential. Barely noticeable at first; accelerates; by the last act the wall is advancing meters per second.
 - **Narrative function:** forces converging geography. Late-act survivors are funneled to whatever shelter is closest to the bubble's shrinking center — typically the cave at the east cliff base in this draft. The shrink is the arena's only gamemaker intervention; Rain triggers it and otherwise does not interfere.
 - **Visually:** the bubble on the stadium floor is always growing; the world inside is always shrinking; both statements are true and describe the same event from opposite sides of the warp.
+- **True colosseum scale (held back, paid once):** the colosseum is *small* — a football-field of sand under a **single tier** of bleachers, seating a couple hundred. At match start the full ~1km interior reads, from outside, as a ten-meter egg; a contestant inside reads as a thing **a couple of inches tall** against the field. Do NOT cut to true exterior scale during the match — keep the interior reading as a full wilderness. The exterior scale is revealed **exactly once**, at the dissolution, for spectacle.
+- **The dissolution (one survivor):** as the wall reaches the last body, the warp spends its remaining stored scale magnifying him — the final survivor reads as a **~200-foot colossus** filling the arena; the swelling shell shoves the **jumbotron off its rigging and up into the dreamscape vacuum.** Then the warp **inverts** and the magnified figure goes up in a blue-holographic **glory-poof** — the death-VFX rendered god-sized. CRITICAL: this is the **warp-image** releasing, **not** the contestant dying. The mist clears to reveal the survivor **untouched at true scale** on the sand. The **mist-poof = dead** rule (§8.5) is preserved — the man never poofs; the warp does.
 
 ### 8.5 Death VFX: the mist-poof rule