Dr. Scramble’s Laboratory is the new trade-in hub sitting where the old Rift portal used to be, and it runs on egg-crafting recipes instead of a random sacrifice roll. You feed it three specific biome eggs at once, it fuses them into a Biohazard or mutant egg, and a separate Biohazard Pity Spinner tracks your luck up to a guaranteed top-tier result at 200 spins.
It’s a completely different loop from the old Rift, and after spending several sessions actually running eggs through it, the system rewards planning across biomes far more than it rewards grinding one zone on repeat.
What Actually Changed When the Laboratory Replaced the Rift
The old Rift event asked you to sacrifice pets or eggs into a portal for a random chance at a reward, and a lot of players still search for that flow out of habit. Dr. Scramble’s Laboratory throws that model out entirely. The building itself now occupies the same physical spot the Rift used to sit in, but opening it shows recipe slots rather than a sacrifice screen. Instead of feeding the machine whatever eggs you have on hand, you’re matching specific named eggs to specific recipe requirements, and the payoff is a crafted egg rather than a loot-table pull.
This matters for anyone who leaned on the Rift for quick fodder disposal, because that shortcut is gone. You now need to actually check what a recipe wants before you commit anything, or you’ll burn a rare egg on a slot it was never meant to fill.
How the Egg-Crafting Trade-In Works, Step by Step
Every recipe in the Laboratory calls for three eggs pulled from different biomes, not three copies of the same egg. One confirmed recipe pairs a Red Pandas Egg (Mythic) with a Salamander Egg (Legendary) and a Snowy Owl Egg (Rare) sourced from Cherry Blossom. That spread is deliberate: the devs built recipes so a single farming run in one zone can never complete them on its own.
In practice, the process looks like this:
- Open Dr. Scramble’s Laboratory from the building that replaced the Rift portal.
- Browse the available recipe slots and check which three eggs each one calls for.
- Drop matching eggs from your inventory into the empty slots.
- Confirm the craft to receive the resulting Biohazard or mutant egg.
- Hatch the crafted egg like any other once it’s back at your base.
Because the ingredients are locked to specific eggs and rarities, the smartest habit is to stop auto-hatching every egg you pick up. Set aside anything that could plausibly slot into a recipe first, then hatch the rest.
Recipe Requirements at a Glance
| Recipe slot | Egg | Rarity | Source biome |
| Slot 1 | Red Pandas Egg | Mythic | Cherry Blossom |
| Slot 2 | Salamander Egg | Legendary | Cherry Blossom |
| Slot 3 | Snowy Owl Egg | Rare | Cherry Blossom |
The developers haven’t published a full recipe list yet, so treat any complete chart you find online — including this one beyond the confirmed example above — as unverified until you’ve checked it against the in-game menu yourself. Expect the exact requirements to shift if the team rebalances ingredients in a future patch.
The Biohazard Pity Spinner: Why the 200-Spin Cap Matters
Sitting next to the recipe slots is a Biohazard Pity Spinner with its own progress counter, starting at 0 out of a 200-spin cap. You also start with two free rerolls, which is the part most players burn too early. Every craft nudges the pity counter forward, and hitting the 200 mark guarantees the top reward outright instead of leaving you to chase it through pure RNG.
How many rerolls do you get to start with? Two, and they don’t refresh automatically — they’re a one-time cushion for an unlucky early result, not a resource to spend on your very first spin out of impatience.
Can you still trade in eggs the old Rift way? No. The sacrifice-for-random-reward mechanic is gone along with the Rift portal itself, so any guide describing a straightforward “dump eggs, get random reward” flow is describing the previous system, not the current one.
Dr. Scramble’s Laboratory vs. Dr. Scramble’s Experiments Shop
This is the single biggest point of confusion around the update, and it’s worth separating clearly:
- Dr. Scramble’s Laboratory — where you physically craft eggs by combining three biome eggs into a recipe. No currency changes hands here; it’s ingredient-for-ingredient.
- Dr. Scramble’s Experiments — a separate shop back in the safe zone that spends Samples, a currency earned from the Dr. Scramble world boss fight (1,750 Samples per kill, every 30 minutes) and from his drone event. This is where boosters, the Scrambled mutation, and pets like Experiment #001 and Nibbles #013 get purchased.
Does the Laboratory use Samples? No — Samples are exclusively an Experiments-shop currency. Eggs never buy anything in the Experiments shop, and Samples never fill a Laboratory recipe slot. Keeping the two systems mentally separate saves a lot of wasted farming time.
If you’re chasing Experiment #001 specifically, note that it carries a one-per-account purchase limit and the highest Sample cost in the shop, so most experienced players bank Samples toward it before spending on boosters.
Which Eggs Are Actually Worth Saving
Not everything you hatch should go toward a recipe. Your rarest pulls — an Angel Egg or a Tiger Egg, for instance — are exactly the kind of egg you don’t want sitting in a crafting slot, since recipes are built around your regular biome-egg surplus rather than your best possible rolls. Pets you’ve already hatched, like an Eternal Gorilla King sitting in your base, aren’t touched by any of this either — the Laboratory only interacts with unhatched eggs, so nothing already earning cash-per-second is at risk.
A more sustainable habit is stockpiling duplicate mid-to-high rarity eggs from every biome you clear, rather than hatching the moment you get home. Since recipes deliberately mix rarities across zones, a wide spread of banked eggs gets you to a completable recipe faster than depth in any single biome.
How This Fits Into the Rest of the Dr. Scramble Update
The Laboratory is only one piece of a much larger event. The world boss fight, the Boss Mastery track running up to 100 kills, and the side quest tied to Nibbles, the escaped experiment hiding in the Abyss Ocean secret cave, all run in parallel with the crafting system. That side quest connects back to the earlier confrontation over Sammy, and completing it opens the Stolen Experiment Vault, which is tracked completely separately from anything in the Laboratory’s recipe slots.
Newer biomes added in Update 4, like the Angels vs Demons zone, are also worth factoring in here, since higher-tier zones tend to produce the rarer eggs that recipes call for. If you’re trying to keep up with everything the game has shipped since, the running list of Steal an Egg updates is the fastest way to see what else changed alongside this event.