Steal an Egg: How to Get the Largest Eternal Egg in the Angels vs Demons Update

Update 4 of Steal an Egg, Angels vs Demons, arrived on September 13, 2026 with a nightly rotating biome, eight Light pets, eight Darkness pets, and a replacement for the old Monster Egg. It also reshuffled the race everyone actually cares about, which is the hunt for the heaviest Eternal egg you can physically fit in your pen. Weight is the whole game here, because a heavier egg means a bigger pet and far more money per second once it hatches.

Quick answer: Buy Luminous Eggs from the Shop, check weights in the Sell Eggs menu, place the heaviest Eternal egg in your pen, apply a Fractured mutation with Boss Tokens, then hatch it.

Why egg weight decides the size of your Eternal pet

Every egg in the game carries a weight value in kilograms, and that number maps directly onto the size of the model and the income the pet produces. A 31kg Luminous Egg and a 4,201,500kg Luminous Egg can roll the same species and still be worlds apart in payout. The biggest recorded pulls sit in the millions of kilograms, and those are the ones worth clearing pen space for.

Egg weight	Hatched pet	Income
20,249,787kg Titan Temple Egg	Fractured Gorilla King	$57.6B/s
4,201,500kg Luminous Egg	Eternal Terra Snapper	$10B/s
Mutated giant Luminous Egg	Eternal Fractured Terra Snapper	$55B/s
Mutated Luminous Egg	Rainbow Fractured Electric Eel	$24.6B/s

With gamepasses stacked on top, that Gorilla King climbs to $115.2B/s, which is enough on its own to carry a base past $760B/s in total income. The lesson is simple: one colossal egg beats a pen full of small ones.

Where giant Eternal eggs come from

Luminous Eggs from the Shop

The Luminous Egg took over from the Monster Egg in Update 4. It drops from a pool of six pets and carries a rare chance to re-roll into a luminous variant, but the reason to buy it in bulk is the weight lottery. Packs are sold for Robux, with a 50-pack priced at 1,120 Robux, and larger runs of 70 are possible in one sitting. Most of what you open will be light, throwaway eggs. The occasional pull lands in the hundreds of thousands or millions of kilograms, and that is your Eternal candidate.

Stolen eggs from the Angels and Demons biome

The new biome only appears at night, and each night it rolls into the Angels side, the Demons side, or the rare Merged version that carries both egg pools plus a luck bonus. You need 20 billion Speed to steal an egg from any of those three and make it home, because each side has its own guardian that will catch you below that threshold. The Eternal targets here are the Pegasus egg on the Angels side and the Skeleton Horse on the Demons side, alongside Secret spawns like Pure Jellyfish, Gargoyle, and RazorFang.

Player character sprinting through the Snow zone on the run out to the Angels biome — The Snow area sits partway along the track run that ends at the Angels section.

Server announcements call out rare spawns, so server hopping is a legitimate way to find an Eternal egg you did not have to wait for. Two or even three Secret eggs can spawn at once, which usually means a scramble against everyone else on the server. On the Demons side, the lava path and the boss guard are the real obstacles, and an alt account parked near the guard to pull its attention makes a heavy RazorFang egg far easier to walk out with.

Traps laid by other players are common around the open sections of the new zones, and stepping on one while carrying an egg can lose you the run.

Sorting your inventory for the heaviest eggs

Pen space is the limiting factor once you start buying Luminous Eggs in packs, so do not place them at random. Open the Sell Eggs menu and read the weight and money-per-second figures listed against each egg, then place only the top entries. Mid-tier finds in the 101,000kg to 419,000kg range are worth a slot; anything in the low thousands is better sold or cleared out.

All Items inventory list with a 31Kg Egg entry highlighted among stored eggs — The All Items inventory shows each egg’s weight, like this 31Kg entry, so you can skip the small ones.

Upgrading the pen to Level 12 MAX costs 5Qa and gives you the room to hold several giants at once. The Angels vs Demons base upgrade also adds one extra equipped pet slot, which matters at the point where you are equipping two or three multi-billion earners.

Applying the Fractured mutation with Boss Tokens

A mutation is what turns a heavy egg into a record-setting one. Fractured is the one worth chasing, and it is the difference between a $29B/s Terra Snapper and a $55B/s one. Mutation Consumables are bought with Boss Tokens, and the roll is random, so budget for failures.

Clear Rift bosses to bank Boss Tokens. The Rift portals in areas like Forest, Volcano, and Abyss Ocean all pay out, and an hour of steady boss runs is enough to reach roughly 3,600 tokens.

The purple Rift portal in the Forest area is one of the boss entrances that pays out Boss Tokens.

Visit the Boss Shop and spend those tokens on Mutation Consumables. Buying in bulk is the practical approach, since a stockpile of around 7,400 tokens converts into enough consumables to brute-force a result.

Use the consumables on the giant egg while it is sitting in your pen. Failed attempts are normal and consume the item; keep going until the Fractured tag appears on the egg before you hatch it.

Hatching the egg and confirming the result

Big eggs take a long time to grow in the pen, and the heaviest ones can sit there for many hours before they are ready. You know an egg has finished when the Egg Ready! prompt appears above it, at which point interacting with it hatches the pet.

The “Egg Ready!” label above the avatar is the confirmation that an egg has finished growing.

If you would rather not wait, Instant Grow All costs 200 Robux and finishes every timer in the pen at once, which is how a 20,249,787kg egg gets opened the same session it was placed. There is also a cheaper Instant Hatch option priced at a handful of Robux for individual eggs. After hatching, equip the new pet and check its money-per-second figure on the pet card to confirm the mutation carried through.

Hatch out and sell your small pets before dropping a giant into the pen, since a colossal model takes up a large amount of physical space.

Fusing duplicates into a stronger Eternal

Duplicates are not dead weight. The Fuse Machine at your base takes multiple copies of the same pet and a cash fee, then hands back a fused egg to place in the pen. Four Terra Snappers go in and one egg comes out, and the same works for older species like Kraken and TRex at costs in the billions.

The Secret Shrine added in Update 4 is the higher-tier version of that idea, and it only accepts Eternal or Divine pets of the Light and Darkness types. It sits on the left side of the new biome, hidden behind the largest waterfall on an Angels night or the biggest magma flow on a Demons night. Walk into the wall and jump a few times to trigger the entrance, then place one Light pet and one Dark pet on the matching pedestals.

The glowing shrine beside the pool marks the fusion area reachable from the new biome.

There are two fusions available. Pegasus and Skeleton Horse combine into the Eternal Equinox, while ArchAngel and World Burner combine into the Divine Aetheron. Pets from older biomes are rejected, so the shrine is the one reason to keep hunting duplicate Eternals on both sides of the rotation.

The fastest route to a record egg is a boring one. Push Speed with the new Angelic Treadmill tier until the 20 billion gate opens, buy Luminous Eggs in volume and place only the heaviest rolls, then spend every Boss Token you earn on Mutation Consumables until Fractured sticks. Do that, and the colossal Eternal in your pen stops being luck and starts being a schedule.