(Was UNIVERSE §20.)
- Tower architecture: rectangular locally, circular globally, enormous through repetition.
- Tower ruin: order → damage → accidental architecture.
- Altitude: architecture stays; environment changes.
- Tower interior: enclosed but internally porous.
- Tower ornament: architectural, never narrative.
- Human material: we make it.
- Creature material: we reshape it.
- Tower material: we adapt around it.
- Tower equipment: fragments of something much larger.
- Tower adaptation: provenance + property + human completion.
- Porter: load first, human second.
- Porter combat: the load is the ability.
- Combat: humans fight horizontally; the Tower continues vertically.
- Standard creature: one strong alien idea is usually enough.
- Boss: spectacle may justify bespoke environment/mechanics.
- Mystery: absence of explanation is not missing lore.