Slime RNG recipes are the game's crafting system layer that sits on top of the gacha roll loop. The official game description includes "Upgrade your slimes!" as one of the core loops, and community coverage of the game confirms a crafting bench appears once you reach World 2. Recipes let you combine duplicate slimes plus Goop into upgrades, ingredients, and rarely a guaranteed higher-tier slime. If you have a stack of duplicates that you cannot otherwise use, the crafting bench is where they earn their keep.
This page lists every recipe we have verified as of 24 May 2026. The list grows when Stouts Studio ships crafting updates (the game receives content updates daily). Cross-reference with the in-game crafting bench — if a recipe shows there but not here, ping us in the official Discord and we will refresh.
How crafting works in Slime RNG
Crafting requires three components: duplicate slimes (you keep your Slime Index entry; only the duplicates are consumed), Goop (the universal currency — see the goop farming guide), and a crafting bench that unlocks at the end of World 2. Open the bench, select a recipe, confirm the ingredients, and the result lands in your inventory after a short animation.
The smart play is to craft during a luck-stacked roll session, not before. Every duplicate slime you spend on a recipe is one less slime available for your autobattle team, and you want your strongest autobattle setup running while you stack Goop for the next rebirth.
Slime RNG crafting recipe list
The table below shows every recipe we have confirmed. "Source" tells you which crafting bench tier unlocks the recipe. "Notes" explains what the result is good for.
| Result | Ingredients | Source | Notes |
|---|---|---|---|
| Crystal Slime Catalyst | 3× Crystal Slime + 50K Goop | Crafting bench (World 2+) | First-tier upgrade catalyst — unlocks higher slime evolution path |
| Frost Essence | 5× Frost Slime + 25K Goop | Crafting bench (World 3+) | Used in higher-tier recipes |
| Lava Core | 3× Lava Slime + 100K Goop | Crafting bench (World 4+) | Crafting ingredient for endgame items |
| Lucky Charm | 1× Lucky Slime + 250K Goop | Crafting bench (Rebirth 1+) | Equippable — small permanent luck bonus |
| Cosmic Fragment | Crystal Catalyst + Frost Essence + Lava Core | Crafting bench (Rebirth 2+) | Endgame crafting milestone |
| Galactic Slime Egg | 5× Cosmic Fragment + 1M Goop | Crafting bench (Rebirth 5+) | Hatches into a guaranteed A-tier slime (may roll Mythic with luck) |
Crafting strategy by stage
Early game (Rebirth 0-1)
Focus on the basic Crystal Catalyst and Frost Essence. These unlock the higher-tier recipe path. Do not waste Lucky Slimes on the Lucky Charm yet — save them for after Rebirth 1 when the permanent bonus matters more.
Mid game (Rebirth 2-4)
Cosmic Fragment is your milestone. Craft enough Crystal Catalysts and Lava Cores to chain into Cosmic Fragments, then stockpile for the Galactic Slime Egg recipe.
Endgame (Rebirth 5+)
Galactic Slime Eggs are the crafting prize. Each guarantees an A-tier slime with a chance to roll Mythic. The Goop cost is steep but a Galactic Egg hatched during a high-luck window is the most efficient way to chase a guaranteed Legendary or Mythic without burning Big Dice.
Common crafting mistakes
- Crafting duplicates of slimes you still need for autobattle. Check your autobattle team before confirming a recipe. Spending your strongest Lava Slime on a Lava Core nukes your World 4 farming speed.
- Hoarding ingredients past a rebirth. Crafting ingredients persist through rebirth, but Goop does not. Spend on recipes before pressing rebirth, not after.
- Ignoring the Lucky Charm. The Lucky Charm is a permanent equippable luck bonus. Once you have Rebirth 1 unlocked, craft one — the small permanent boost stacks with everything else.
- Skipping the Cosmic Fragment chain. Cosmic Fragments are the gate to Galactic Slime Eggs. Even casual players should aim for at least one Cosmic Fragment in their inventory by Rebirth 3.
FAQ
Where is the crafting bench in Slime RNG?
The crafting bench unlocks at the end of World 2 (Crystal Caverns). It appears as a stationary structure in the central hub area of each world starting at World 2.
Do crafting recipes use up the slimes from my Slime Index?
No. Only duplicates are consumed. Your Slime Index entry remains intact even if you craft away all your duplicates of a particular slime.
Can I refund a crafted item?
No. Crafting is one-way. Confirm the recipe carefully before pressing craft.
What happens to recipes at rebirth?
Crafting ingredients (Crystal Catalyst, Frost Essence, etc.) persist through rebirth. Goop does not. Use any excess Goop on recipes before rebirthing.
Are there any limited-time recipes?
Yes. Stouts Studio occasionally ships event-only recipes tied to admin abuse streams and patch milestones. Watch the Discord #announcements channel for event drops and check our codes page for related Luck Boost codes.
Keep going
Need more Goop for crafting? See the goop farming guide. Want to know which slimes to keep as duplicates for crafting? Browse the slime list. Planning the rebirth that unlocks higher-tier recipes? The rebirth guide is your map. And always grab free boosts via the latest codes.