Every serious arena Pal in 1.0 ends up carrying Immortality, and there's a good reason. The passive gives 5% life steal, +100% health regen, and +15% Attack, with no downside. A sustain trait that also hits like a damage trait. The annoying part is sourcing it. Legend comes from six legendary Pals. Serenity and Demon God sit at the Surgery Table for gold. Immortality has none of those exits. It doesn't roll on wild catches, it has no guaranteed carrier, and no implant exists for it. The one real door in is mutated eggs, and this guide covers the farm loop plus the breeding side once you own one.
What Immortality Actually Gives You
Immortality is three effects bundled into one passive, and all three are positive:
| Effect | Number | Why it matters |
|---|---|---|
| Life Steal | +5% of damage dealt | Sustains through long arena rounds without healing items |
| HP Regen | +100% | Doubles the passive regen tick between skill windows |
| Attack | +15% | Keeps it competitive with pure damage passives |
The closest comparison is Vampiric. Vampiric also gives 5% life steal, but that's all it gives. No regen, no attack. Immortality is strictly better, and its data entry has no downside line, which is rare for a passive this strong.
Why Nobody Shortcuts This Passive
Every combat passive in 1.0 falls into one of three groups:
- Rollable on wild Pals. Demon God, Diamond Body, Serenity, Ferocious. They show up as rare random passives on catches, and most can be bought at the Surgery Table.
- Guaranteed on specific Pals. Legend and the element Emperors. They're locked to named spawns, so you catch the source once and breed it out.
- Neither. Immortality is alone in this group. The game data marks it as a non-standard passive with no random-roll flag and no Surgery Table cost. The only door in is a mutated egg.
That exclusivity is why arena teams keep carrying it. Every other passive on your final Pal can be bought, rolled, or caught. Immortality is the one you have to farm.
Where Immortality Comes From
There's one primary route and two community-reported secondary ones:
| Source | Status | Notes |
|---|---|---|
| Mutated eggs | Primary, verified | Every mutated hatch rolls the rainbow-passive pool. About 1% per egg on a regular cake, about 3% on Extravagant Vegetable Cake. |
| Ancient Relic Recycler | Secondary, community | Reported to yield single-use implants from Ancient Relics in the late tech tree. Treat it as a bonus, not a plan. |
| Master-rank fishing | Secondary, community | Purple-sparkling catches at high-rank spots reportedly sometimes carry rainbow passives. |
Plan around the mutated egg. The other two are nice when they happen, but you can't control them. Everything downstream works the same no matter which route found your first carrier.
The Mutation Farm, Step by Step
Most guides say "mutated eggs are rare" and stop there. The setup that works for me:
- Build a dedicated mutation ranch. Three parallel pens minimum. Put a Babysitter Pal on the floor first. Without one, your attempts per hour roughly halve.
- Stock Extravagant Vegetable Cake. One cake per egg, keep the chest full. This is your 3% lever.
- Add a Grintale for collection. Its partner skill sometimes grabs an extra egg, which means more samples per cycle for free.
- Don't let the incubator queue fill up. Hatch eggs as they finish so the ranches keep producing. If you're solo, the world setting that zeroes the big-egg timer saves a lot of waiting.
- Watch for the purple glow. Mutated eggs glow purple on the ground. Every one is a potential rainbow carrier. Keep every hatch as a seed Pal and don't condense it away.
- Switch to Special Cake once you have a rainbow. Special Cake plus a clean pool puts the passive onto your actual target with a solid inheritance rate.
The Ancient Hatchery (Lv 76) automates the egg-to-incubator-to-hatch pipeline, which helps with volume. It doesn't change the mutation chance itself. Convenience, not a probability fix.
Breeding It Onto Your Target
Once you have a hatchling carrying Immortality, the hard part is over. The rest is standard breeding:
- Clean it to a single passive. Breed the carrier against a Pal with zero passives until an offspring carries Immortality and nothing else. That's your seed.
- Build the species chain. Pair the seed against a clean parent carrying your other two or three combat passives, per the clean-pool 4-passive guide, then self-breed the target until all four land.
- Keep a spare seed. Immortality is farmed, not bought. Always keep one clean carrier in the box before you condense anything.
For an arena Knocklem, that means breeding the clean carrier into the Anubis line, then Anubis + Bastigor gives you Knocklem with the passive, and you self-breed from there. The species chain is short. The eggs are the part that takes forever.
Cakes in Order
- Extravagant Vegetable Cake (Lv 60) for the acquisition phase. The only cake that raises mutation odds. It costs Flour ×12, Cotton Candy ×8, Potato ×10, Onion ×6, and Carrot ×8 per cake, so budget the farm accordingly.
- Special Cake (Lv 74) once you have a clean carrier and you're spreading the passive. It boosts inheritance, which is what convergence wants.
- Regular Cake for the strip-to-one step, since you're rolling for a single trait on a clean pool.
Run the mutation ranch and the convergence ranch separately. Mixing them means a mutation roll can overwrite a passive you've spent hours locking in.
Pals That Want It Most
Immortality pays off on Pals that do sustained damage in long fights. The arena cores, basically:
- Orserk. Its partner skill stacks Attack and Defense per bullet hit, so the sustain keeps a fully stacked Orserk alive through a whole round. That's the current Legend-rank carry. The arena breeding guide covers the full four-passive stack.
- Knocklem. The double-Knocklem rotation depends on each golem surviving its transform window. Life steal is what lets two of them alternate instead of dying on rotation.
- Raid and World Tree bosses. Long single encounters are where regen and life steal compound, which is why Xenolord carries Immortality on most raid clear teams.
Budget for the eggs. At roughly 3% per Extravagant-cake egg, treat 30 to 40 eggs as the realistic window for a first carrier, then a few more to clean it down to a single passive. The species work after that is the easy part.
Find the shortest route from your box
Once the clean carrier exists, the question is the shortest multi-generation path to your target Pal. I keep PalForge (palbreedingcalc.com) open while I breed. It reads your level.sav in the browser, computes the route, and shows per-step passive inheritance odds. Free and 100% client-side; the save file stays on your machine.
FAQ
Can Immortality appear on a wild Pal?
No. It's a non-standard passive, so it never rolls on wild catches and no guaranteed carrier exists.
Can I implant it at the Surgery Table?
No. It has no surgery cost in the game data, so there's no implant. That's what separates it from Demon God (100,000 gold) and Serenity (50,000 gold).
What's the best way to farm it?
Mutated eggs with Extravagant Vegetable Cake, roughly 3% per egg. The Ancient Relic Recycler and high-rank fishing are community-reported bonuses, not reliable plans.
Once I have one, can I spread it?
Yes. Immortality is inheritable. Clean it to a single passive first, then breed it through any line you want.
Last updated: August 2026.