Bosses & stage route

+1 Venom Evolution bosses are stage checks that test whether your Venom and Strength are high enough to clear a wave and survive a stronger enemy. The most useful confirmed route is Scrap King at Stage 3, Rivet at Stage 5, and a Warden encounter near Stage 6. Prepare in Training, clear the normal enemies first, then keep moving while you deal damage.

This is a scoped route guide rather than a complete boss list. Later encounters are mentioned below only where the evidence gives enough context to help you prepare; several names, rewards, and health values remain undocumented.

Confirmed boss route

The following table separates the encounters that have a usable stage route from later reports that are not specific enough to form a full database.

The name Warden Vale is used here as the primary label because it appears in the route summary, but other combat captions render it as Warden Veil. Check the in-game UI when you reach the encounter. The two spellings should not be treated as proof that there are two separate bosses.

How to prepare for a boss

Use the same preparation loop before each stage checkpoint:

1. Train first. Increase Level, Venom, and Strength before entering the Stage. The training guide covers the loop and paid Chambers, while higher Evolution multipliers are also reported to improve Venom and Strength.
2. Clear the wave deliberately. Normal enemies generally appear before the boss. Avoid spending your strongest ability too early if the wave can be cleared safely without it.
3. Keep a movement path. Scrap King can attack directly, and the Warden encounter adds poison areas to the arena. Circle the boss or reposition between attacks instead of relying on stationary Strength damage.
4. Use Venom abilities consistently. Venom’s extended attacks provide the main damage route. Rivet’s fight specifically includes an Ultimate Ability use, so save it for a clear opening or a dangerous health phase rather than firing it randomly.
5. Retry with an upgrade, not just another attempt. If a later boss removes your health too quickly, improve Venom, Strength, or Evolution in Training before repeating the same fight.

Boss-by-boss tactics

Scrap King at Stage 3

Scrap King is the clearest early benchmark and is reported at 3,200 HP. The practical answer is to keep moving while maintaining Venom damage. Do not interpret its health value as a universal requirement for every account: the evidence records the encounter, but does not provide a complete damage formula or recommended Strength threshold.

After the fight, check the stage gate instead of assuming the next Stage opens automatically. A recorded Scrap King defeat was followed by a progression block, which indicates that Wins, Level, or another requirement may still be missing.

Watch the Scrap King Stage 3 boss fight

This moment introduces Scrap King as the Stage 3 boss and records its defeat, supporting the route and progression advice in this section.

Load 2:19 · Scrap King appears as the Stage 3 boss

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Rivet at Stage 5

Rivet is the next clear boss checkpoint in the route. Its metal armor is a combat description, not proof of a specific damage reduction mechanic, so do not switch to an invented “anti-armor” build. Keep using Venom attacks and use the Ultimate Ability when you have a safe opening.

Watch the Rivet Stage 5 boss encounter

This moment identifies Rivet as the next boss and describes the fight as straightforward, supporting the Stage 5 route and combat advice in this section.

Load 4:41 · Rivet is identified as the next boss

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If Rivet feels straightforward but the next Stage remains locked, check progression requirements rather than farming the boss repeatedly. The available record does not document a unique Rivet reward or a confirmed armor multiplier.

Warden near Stage 6

The Warden fight is more than a target-damage check. The arena is described with poison zones on buildings, so your route must avoid both the boss and the environment. Move to a safer position, attack during the opening, and relocate when the poison area cuts off your path.

Because the name appears as both Vale and Veil, use the in-game name as the deciding spelling. The available evidence does not confirm a Warden health total, a poison damage rate, or a fixed attack cycle.

Later bosses and unknowns

Some footage reports stronger encounters after Stage 7 and a high-health boss around Stage 11. Another report calls a first-world final boss Choir, but the name is uncertain and its exact Stage, rewards, attacks, and health are not established well enough to publish as a reliable stat entry.

Use these reports as preparation signals, not guarantees:

• Expect later enemies to punish low Venom or Strength more quickly.
• Upgrade before retrying instead of assuming that every Stage has a boss.
• Do not use the reported 1M HP as a complete Stage 11 health table; it comes from one description without a matching name and full stat record.
• Do not assume that every boss grants the same Wins or unlocks the next Stage immediately. Those rewards and progression rules are not fully documented.

FAQ

Does every Stage have a boss?

That is not confirmed. The evidence identifies bosses at several checkpoints, while some Stage descriptions do not establish a boss encounter. Treat the route above as the clearest confirmed sequence, not proof that every Stage ends with a boss.

Should I stand still and use Strength against bosses?

No. Movement is part of the supported strategy: Scrap King attacks actively, and the Warden area includes poison zones. Use Strength and Venom to improve output, but keep repositioning so the environment and boss attacks do not decide the fight.

Are Warden Vale and Warden Veil different bosses?

The available records do not prove that. They may be inconsistent recognition of the same encounter. Verify the name in the game before treating them as separate entries.