Pet Expeditions: Gold and Eggs
What this page helps you decide: which pets to send out and which to keep, because an expedition removes a pet from your active roster while it runs.
Pet expeditions are the idle system of this game: you send spare pets out from Ali's stall, and they come back with Gold and, occasionally, an egg. Two things about that egg make the system more interesting than a Gold generator. First, the chance is described as very small by two independent sources, neither of which publishes a number. Second, the egg it returns can hatch any pet in the game, which makes it the only published route that could produce Storm Eagle, Moon Spirit or Faith Guardian - the three pets with no documented acquisition route of their own. The cost is availability: a pet on an expedition is not on your character.
The only published route to the three undocumented pets
Six pets appear in the official template and only three have a published acquisition route: Icy Dragonet from the closed Season 1 store, Divine Dragonet from the closed Season 1 wheel at 0.5%, and Phoenix Kitsune from a 1,299 Robux pack. Storm Eagle, Moon Spirit and Faith Guardian have no documented route at all. The expedition egg is described as able to hatch any pet in the game, which makes it the only published mechanism that could produce those three. That is a meaningful statement about the system even without a rate attached, because it means expeditions are the only non-Robux route to a named pet that anyone has documented as still working.
What the roster cost actually is
The published advice to keep a usable pet during expeditions is more than a courtesy note. Pets contribute sub-stats, and the sub-stat page names Movement Speed, Dash Distance and Dash Charge Rate as stats that can roll on a scroll or a pet. Movement speed in particular is the stat the Beastiary keeps pointing at: it frames the Yeti's threat as a speed comparison, the Executioner boss's danger as a speed gap, and makes the dragon's laser dodge easier. So sending every pet out is not a free idle play - it can measurably change how a dungeon run goes, which is exactly why the source flags it.
Rates, caps and durations: all unpublished
The chance of an egg is described as very small and never quantified. How long an expedition takes is not published. How many pets can be sent at once is not published. How much Gold an expedition returns, or whether it scales with the pet's level or ascension, is not published. Whether the egg's contents are uniformly random across all pets or weighted is not published - the phrase used is that it can hatch any pet in the game, which describes the pool rather than the distribution. Both independent sources that describe expeditions agree on the mechanic and neither adds a number, which is the same pattern as everywhere else in this game's pet documentation.
Step-by-Step
- Send genuinely spare pets. The published warning is to keep a usable pet for dungeon runs, because an expedition takes that pet out of your active roster while it is away.
- Treat the Gold as the reason and the egg as a bonus. Both sources describe Gold as the reliable output and the egg as a very small chance with no published rate.
- Weigh an expedition against ascension for the same duplicate. Ascension consumes it permanently for one ascension level; an expedition returns it with Gold.
- Do not plan a pet acquisition around the egg. With no published rate, there is no way to calculate an expected number of expeditions for any outcome.
- Remember what a pet on your character is doing: pets are one of three sub-stat sources alongside gear and your equipped scroll, and movement stats can roll there.
- Feed the Gold back into enhancement, which consumes Gold alongside cave materials and never fails - the most reliable use for expedition income.
Data Tables
| Output | How it is described | Rate published |
|---|---|---|
| Gold | The reliable output of every expedition | No amount published |
| Pet egg | A very small chance | No |
| Egg contents | Can hatch any pet in the game | No distribution published |
Two independent sources describe the mechanic identically and neither attaches a number to any part of it.
Tips & Notes
- Because the egg can be any pet, an expedition is the only published way to obtain a duplicate of a pet you cannot buy - which links this system directly to ascension.
- Update 11.3 added a toggle for pet visual effects, which is a quality-of-life change rather than a mechanical one, but it does mean pet visibility is now a setting rather than a fixed cost.
- Expeditions, enhancement and ascension all live behind the same NPC, so a single trip to Ali's stall can start an expedition, spend cave materials and consume a duplicate in one visit.
FAQ
What do pet expeditions do in Iron Soul: Dungeon?
They send spare pets out to collect Gold, with a very small chance of returning a pet egg. That egg can hatch any pet in the game, and no source publishes the chance, the duration or the Gold amount.
Should I send all my pets on expeditions?
No. The published advice is to keep one usable pet for dungeon runs, because a pet on an expedition is off your active roster and pets carry sub-stats including movement speed.
Can expeditions give you rare pets?
Possibly - the egg is described as able to hatch any pet in the game, which is the only published route that could produce Storm Eagle, Moon Spirit or Faith Guardian. But with no rate published, it is not something you can plan around.
Sources
- Community Iron Soul Wiki (community) - Pets — Sending spare pets on expeditions, Gold collection, the very small egg chance and the egg hatching any pet in the game.
- Community Iron Soul Wiki (ironsoulwiki.com) - Pets database — Independent description of the pet expedition menu producing Gold and rare pet eggs.
- Community Iron Soul Dungeon (ironsouldungeon.com) - Pets — The advice to keep a usable pet during expeditions and the note that no reliable fixed chance is published.
- Official Official Iron Soul Roblox Wiki - Sub-stats — Pets as one of three sub-stat sources and the movement stats that can roll on them, which is the roster cost of sending one away.