Rarest slimes · Updated July 9, 2026
What Is the Rarest Slime in Slime RNG?
Short answer: Astro is the rarest public recipe slime we track, with a cited 1 in 2.47B odds note. For roll-table hunts, players usually compare Void Slime and Huge variants, but those numbers are less stable across public sources.
Use this as a rare-hunt shortlist, not a final market-value table. Public stats and trade values change too quickly to publish as fact without game testing.
Rarest answer by search intent
Players ask this in two different ways: some want the rarest named slime, and others want the best rare slime to chase for progression or trading. That distinction matters because craft odds, roll odds, Huge variants, and trade value are not the same thing.
- Rarest public recipe note: Astro Slime, cited in public recipe data as a 1 in 2.47B craft.
- Earlier rare craft target: Puffy Slime, cited as 1 in 195M and tied to Candyland recipe searches.
- Roll-table rare hunt: Void Slime and Huge variants are common public shortlist targets, but exact live odds need in-game checking.
| Slime | Role | Stage | Known odds | Confidence |
|---|---|---|---|---|
| Fin Unknown public rarity | Early damage candidate | Early game | Unverified | low |
| Lucky Ingredient slime | Crafty recipe ingredient | Cave / mid game | Unverified | medium |
| Rocky Ingredient slime | Crafty recipe ingredient | Cave / mid game | Unverified | medium |
| Mushy Ingredient slime | Crafty recipe ingredient | Cave / mid game | Unverified | medium |
| Crafty Crafted | Mid-game craft result | After Heaven machine | Recipe output | medium |
| Spike Unknown public rarity | Damage candidate | Mid game | Unverified | low |
| Orca Unknown public rarity | Damage candidate | Mid to late game | Unverified | low |
| Thorn Crafted | Jungle craft result | Jungle era | Recipe output | medium |
| Huge Spike Huge variant | Rare hunt target | Post-Rebirth hunting | Unverified | low |
| Geode Crafted | Mushroom Forest craft | Late mid game | Recipe output | medium |
| Puffy Crafted | Crafting chase | Candyland recipe stage | 1/195M public reference | medium |
| Astro Crafted | Rarest public recipe note | Crystal Cavern recipe stage | 1/2.47B public reference | medium |
| Void Slime Unknown public rarity | Late damage candidate | Late game | Unverified | low |
How to use this tier list
Upgrade slimes that help you clear enemies faster right now. A rare name that cannot carry your current zone is less useful than a leveled, practical damage slime.
If you are planning a rare-hunt session, open the Slime RNG luck calculator and compare 1h, 6h, and 24h chances before spending potions or server luck.
Rarest does not always mean best
Astro and Puffy are useful for answering "what is rarest", but progression still depends on where you are in the zone route. If your damage or coin flow is low, a practical crafted slime can beat a rarer flex target for real progress.
FAQ
What is the rarest slime in Slime RNG?
Among public recipe references, Astro is the rarest named craft we track at a cited 1 in 2.47B. For roll-table hunting, public pages often point players toward Void Slime and Huge variants, but those odds still need in-game verification.
Is this an official Slime RNG tier list?
No. It is an unofficial, conservative list based on public pages and should be updated with in-game stats.
Should I upgrade only the rarest slime?
No. Progression depends on damage, stage, level, and whether you can actually use that slime efficiently.
Why are many rows low confidence?
Public tier lists disagree and exact odds/stats need game testing, so uncertain picks are labeled low confidence.