Steal Animal Egg Mutations Tier List

Mutations are the quiet power spike in Steal An Egg. Two players can own the same pet name while one earns multiple times the $/s because of Rainbow, Parasite, Golden, or Silver. This page ranks those mutations for income, then explains when to chase them versus when to fuse or keep grinding biomes.

For pet name rankings, use Best Pets. For machine steps and the Secret Shrine, use Mutations & Fusion. This list stays focused on multiplier value and decision-making.

Mutation multiplier table

Approximate values used across this wiki (community consensus, late 2026):

Tier	Mutation	Approx multiplier	Role
S	Rainbow	~x3.5	Best general income multiply
A	Parasite	~x3	Near-Rainbow power
B	Golden	~x2.5	Strong mid chase
C	Silver	~x1.2	Nice-to-have polish
Special	Enchanted Mutation	Consumable (Update 7)	100% apply success via Butterfly Bloom

These are approximate. Patches can retune visuals or rates, but the relative order (Rainbow > Parasite > Golden > Silver) is what matters for planning. The Enchanted Mutation is a separate Update 7 consumable earned through Enchanted Forest Butterfly Bloom — apply it to keepers the same way you would spend a premium mutate.

S tier — Rainbow (~x3.5)

Rainbow is the mutation you build stories around. On Skeletal Sabertooth, Mecha Scrambler, or Aetheron, Rainbow creates absurd cash flow for Speed purchases in the billion-plus biome brackets (Cherry Blossom, Titan Temple, Angels & Demons, Enchanted Forest).

Do: mutate your highest base earners first.
Do not: burn rare shrine ingredients hoping for Rainbow cosmetics before you understand fusion needs.

Rainbow on a weak Forest pet is still a weak Forest pet with makeup. The multiplier amplifies the base — it does not invent a new base.

A tier — Parasite (~x3)

Parasite sits just under Rainbow and often feels “good enough” to stop rerolling for a long time. If you land Parasite on an A-tier or S-tier pet, equip it and push biomes. Chasing Rainbow immediately can waste sessions you could spend clearing 700M Cosmic or 2.5B Cherry Blossom Speed gates.

Parasite also pairs well with mid-game grinders: a Parasite B-tier earner can fund Volcano and Abyss while you wait on mythic hatches.

B tier — Golden (~x2.5)

Golden is the first mutation that meaningfully changes upgrade math for average accounts. Hitting Golden on your best mid-game pet often marks the transition from “barely afford Snow” to “comfortably bank Volcano attempts.”

Farm Golden when:

• Your best pet is still unmutated or Silver.
• You can already clear the biome that produces that pet with acceptable death rates.
• You are not one duplicate away from a critical fusion.

Skip obsessive Golden grinding when your Speed is the real bottleneck — buy Speed first using How to Get Speed, then mutate.

C tier — Silver (~x1.2)

Silver is a nudge, not a transformation. Take it when it falls into your lap. Do not spend premium resources chasing Silver on a pet you plan to replace tomorrow. Think of Silver as polish for a unit you already like.

Decision framework: mutate, fuse, or push biomes?

Ask these questions in order:

1. Is my Speed below the next biome recommendation? If yes, earn and train before rare mutation hunts. See Biomes & Speed Requirements.
2. Is this pet among my top three earners? If no, mutating it is usually a distraction.
3. Is this pet a Secret Shrine ingredient? ArchAngel and World Burner combine into Aetheron — do not casually feed them to 3-to-1 experiments.
4. Do I have duplicates? Fuse commons; protect uniques.
5. Will a better base hatch soon from a biome I can already clear? If yes, wait; mutate the better base later.

Synergy with the Best Pets list

Base pet quality	Preferred mutation target
S-tier earner	Rainbow or Parasite ASAP
A-tier earner	Golden minimum, Rainbow dream
B-tier climber	Golden if you lack better bases
C-tier early pet	Accept Silver; replace soon

Example math mindset: a plain ~$7.5B/s Mecha Scrambler already rivals many mutated lesser pets. A Rainbow Mecha becomes a Speed engine for Titan Temple and beyond. Meanwhile, Rainbow on a starter Lake pet will not carry Angels & Demons.

Enchanted Mutation note (Update 7)

After you unlock the Enchanted Tree at ~50B Speed, Butterfly Bloom lets you convert butterflies into an Enchanted Mutation consumable advertised at 100% success. Treat it as a guaranteed apply on a pet you already decided to keep. Full route: Enchanted Forest Guide and Mutations & Fusion.

Fusion interactions

• 3-to-1 machine: typically sinks three pets into one result. Confirm whether mutations transfer or reset in the current patch before sacrificing a Rainbow parent.
• Secret Shrine: ArchAngel + World Burner → Aetheron (~$6.9B/s class). Plan shrine crafts deliberately during Angels & Demons farming windows.
• Hidden Enchanted Forest fusion machine: separate secret from Update 7 — do not mix it up with the Aetheron shrine.
• Trading is offline, so you cannot buy a mutated pet from another player yet — local grinding and luck matter more.

Always re-read Mutations & Fusion after updates; machine rules are patch-sensitive.

Practical mutate session

1. Snapshot your roster $/s and note top three pets.
2. Claim free gifts if available (Codes Hub).
3. Run safe steals in a biome you can escape (How to Steal Eggs).
4. Hatch new eggs; compare bases before spending mutate attempts.
5. Attempt mutations only on keepers.
6. Re-equip the highest multiplied income team.
7. Convert cash to Speed; unlock the next nest tier.

Related reading

• Tier List Hub — ranking philosophy
• Best Pets — name-by-name income tiers
• Pets Hub — rarity overview
• Updates Hub — patch chronology that may retune rates
• Guides Hub — mechanical walkthroughs

Mistakes to avoid

• Treating Silver like a jackpot.
• Mutating fusion ingredients required for Aetheron.
• Ignoring Speed while fishing for Rainbow screenshots.
• Comparing mutated weak pets to unmutated strong pets by vibes instead of $/s.
• Trusting scripts to “auto perfect mutate” safely — see Scripts Hub for ban risk context.

Master mutations after you respect bases. Rainbow is S-tier because it multiplies greatness — not because it replaces the need for Skeletal Sabertooth-class pets and honest biome progression.