Dark · Divine · Update 4

World Burner in Steal an Egg

The Divine pet of the Dark pool — one egg, one side, one night at a time. Here is where World Burner comes from, what it is for, and the fusion recipe that uses it.

By Steal an Egg Wiki · Site Maintainer: CT

Last updated: Sep 23, 2026

What World Burner is

World Burner arrived with Update 4 on September 12, 2026, the same drop that added the Angels vs Demons biome. It is a Dark-side Divine pet: it does not come from a shop, a code, or any of the older nests. It is part of the eight-pet Dark pool, and the only way to roll it is to hatch the egg that pool belongs to.

Rarity matters here because of what sits below it. The Dark pool runs from Legendary filler pets up through Cosmic, Secret and Eternal entries, then World Burner at Divine — the single highest roll on the Demons side. Skeleton Horse is the Eternal second-place, and everything below is progressively easier to pull.

Pet: World Burner
Rarity: Divine
Side: Dark — hatches from the Demon Egg
Biome: Angels and Demons — the zone added beyond Titan Temple
Availability: Night only, and only when the biome rolls to its Demons form
Fusion use: ArchAngel + World Burner produces Aetheron
Added: Update 4, September 12, 2026

How to get World Burner, step by step

1Bank the Speed gate first
World Burner lives in the Angels and Demons biome, which sits past Titan Temple and needs 20 billion Speed to reach. Do not queue for the zone until your treadmill training puts you there.
2Wait for a night when the biome rolls Demons
The biome flips between a Light form and a Dark form each night and players cannot choose. The Demon Egg only spawns on a Dark night, so if your server is on the Angels side, hop servers rather than waiting.
3Steal a Demon Egg and get it home
Grab the egg from a nest in the Demons form of the biome and carry it back to your pen without being tackled. This return trip is why community trackers suggest roughly 50 billion Speed before you commit to a full run.
4Hatch in bulk, not one egg at a time
World Burner is the Divine roll of the Dark pool, so the odds are the point: run several Demon Eggs in a single session instead of hatching one and logging off.
5Do not fuse it by accident
World Burner is one half of a Shrine recipe. If you only own one, keep it out of the pet fusion machine and out of trades until you have decided whether you want the fusion or the income.

The egg itself, and how the Angel and Demon Eggs differ from every egg that came before them, is covered in the Update 4 guide. If you are still working up to the Speed gate, start with the biome ladder.

ArchAngel + World Burner → Aetheron

The reason World Burner is worth more than a stat line: it is one of only two Dark pets the Secret Fusion Shrine accepts. Place it on a Shrine pedestal with its Light counterpart, the Divine pet ArchAngel, and the Shrine returns an Aetheron Fusion Egg that you hatch in your pen.

One pet per player. You supply the Dark half, your partner supplies the Light half, and both of you take a Fusion Egg home.
Same-side pairs do nothing. Two Dark pets, or two Light pets, will not trigger the Shrine at all — this is the mistake players hit most often on day one.
The Eternal pair is separate. Pegasus and Skeleton Horse fuse on the other pedestal pair to produce Equinox, so owning World Burner does not lock you out of the Eternal result.
Skeleton Horse can substitute. If you cannot pull a World Burner, the Shrine also accepts Skeleton Horse as the Dark Divine-tier half, so the Aetheron recipe is not closed off by a single bad roll.

Farming tips that actually change your odds

Use merged nights. When the biome rolls as the rare combined Angels and Demons zone, both egg types spawn together and the zone gains a luck bonus. That is the window to run volume rather than one careful trip.
Server-hop for the side you need. Because the flip is per-server and not on a published timetable, hopping is faster than waiting for your server to roll over.
Protect the trip home, not the entry. The documented 20 billion figure is the gate; published trackers recommend roughly 50 billion for the run back with an egg in hand, because your carried Speed drops while you are holding it.
Check the pet panel before you sell. Variant and size traits sit on top of base rarity, so two World Burner hatches are rarely the same pet. The income calculator and the pet value calculator help you compare two rolls before you decide which one to keep.

What we can and cannot source

World Burner's existence, rarity, side and Aetheron fusion recipe are consistent with the in-game Demon Egg and Fusion Egg data shipped with Update 4, and with the major Steal an Egg guides that covered the Angels vs Demons drop. Hatch percentages inside the Demon Egg are not published anywhere we can verify, and individual income per second for this pool has not been published either — so this page does not quote either number. Anyone showing a precise World Burner drop rate is showing an estimate.

World Burner FAQ

What is World Burner in Steal an Egg?

World Burner is a Divine-rarity pet added in Update 4 (Angels vs Demons). It belongs to the Dark side of the new biome, which means it hatches from the Demon Egg rather than from any older biome egg or the shop.

How do you get World Burner in Steal an Egg?

Reach the Angels and Demons biome with 20 billion Speed, wait for a night when the biome rolls its Demons form, steal a Demon Egg from the nests there, carry it back to your pen and hatch it. World Burner is the Divine roll inside that egg. There is no shop purchase and no code for it.

How rare is World Burner?

It is Divine rarity, the highest tier in the game — the top of the eight-pet Dark pool. Below it sit Skeleton Horse at Eternal, then the Secret, Cosmic, Mythic and Legendary filler pets. In a pool of eight Dark pets, only World Burner reaches Divine, which makes it the hardest pull on the Demons side.

Can you get World Burner from any other egg?

No. The Light and Dark pools are exclusive to the two Update 4 eggs. Older eggs such as the Cherry Blossom Egg or the cosmetic Luminous Egg do not roll World Burner, and the pet is not part of any limited-egg table. The Demon Egg is the only source.

What does World Burner fuse into?

World Burner placed on a Shrine pedestal together with ArchAngel, its Light Divine counterpart, produces the pet Aetheron. The Shrine is hidden behind the waterfall that faces the large gate at the end of the biome, and each player supplies one of the two pets.

World Burner or ArchAngel: which should you keep?

They serve different jobs. Both are Divine, but ArchAngel is the Light half and World Burner is the Dark half of the same Aetheron recipe. If you own one of each and only have a single Shrine slot, fuse the pair you can most easily replace — and remember Skeleton Horse can stand in for World Burner if you cannot pull one, since the Shrine accepts the Dark Divine half from either source.

Is World Burner worth using in a normal team?

Yes, as a top-end roster pet. Published income figures for the individual Angels and Demons pets are not available, so we do not print a per-second number for World Burner; what is documented is that the whole pool is positioned above the Titan Temple pets that came before it. Slot it, check the income panel in game, and decide from your own numbers.

Page last updated Sep 23, 2026. Pet side, rarity and fusion recipe cross-checked against the Update 4 egg data; drop rates and income are not published by any source we can verify, so we do not state them.