The ten original boss encounters

Enter an encounter

Native source-art previews use the supplied authored geometry, UV layout and texture in a fixed neutral pose. They are not to scale and do not reproduce game animation, seed-specific morphs, glow or live lighting. Wildlife previews show the first authored variant; the roster keeps variant entries separate even where entity IDs are shared. Select a preview to open its full SVG. These are offline renders, not gameplay captures.

These bosses use encounter managers, arenas and qualification rules; they do not spawn as ordinary biome wildlife. Health below is the reported base, before participant scaling or encounter modifiers. Siege Corvette uses ship HP, which must not be compared directly with player health.

Boss	Source preview	Base HP	Access	Core mechanic	Reward role
Scrap Stalker		180	Salvage Works	Break highlighted node to cancel magnetic shell; cover stops its dash	Scrap Heart; Scrap Magnet Module
Brood Matriarch		420	Fungal Catacombs	Break highlighted organs to shorten root cocoon; spores and broodlings	Brood Enzyme; Brood Nutrient
Furnace Custodian		480	Volcanic Foundry	Cooling valves reduce marks or cancel pressure blast; heat, beam and slag	Ceramic Core; Ceramic Lining
Prism Sentinel		440	Fractured Observatory	Align mirrors to return beam; avoid shards and jump pulse	Prism Lens; Prism Guard
Corsair Commander		400	Drifting Fortress	Boarded encounter; frontal shield and cover breaker; mirror routing can stun shoulder	Breach Seal; Breach Cutter
Siege Corvette		1,200 ship HP	Space relay / capital hull	Ship battle; destroying both weapon pods removes broadside attacks for that run	BossB rewards and ship progression
Buried Colossus		900	Colossus arena	Break highlighted pylons; exposed-heart windows, faults and marked impacts	Deep-quarry progression
Tide Sovereign		850	Tidal arena	Basin wheels alter water; waves, pearls and currents	Abyss-harness progression
Stormbound Behemoth		950	Storm arena	Charge rods with marks, then discharge to stun and suppress crown attack	Storm-shelter progression
Archive Prime		1,000	Archive arena	Three relays change order by phase; shield openings, deletion lanes, shards and reindex	Relic Survey and story progression

Clear and claim rules

The first five have explicit variant names; later encounters have variant mechanics. Consoles and reward-cache screens share a UI, while encounter eligibility, rematches, qualification and escrow govern claims.

Scrap Stalker first clear is four Scrap Hearts, 300 credits, 50 data; repeats are one heart, 75 credits, 10 data. The other four first-area bosses specify four materials, 600 credits, 100 data on first clear and one material, 150 credits, 20 data on repeats. These are conditional rewards, not an unconditional inventory grant for everyone nearby. The report does not give a complete reconstructed weighted drop distribution for every BossB reward.

Colossus victory does not leave the planned corpse sculpture. Tide Sovereign victory does not lower a central bridge. Missing presentation features must not be turned into promised traversal or loot mechanics.

See research for grant versus purchase routes and structures for worldgen gates. Brood Regent and Blackwire Foreman belong to the separate outbreak roster, not this ten-boss count.