Mutations are special effects that can appear on random Shells in Shells. Each mutation adds a bonus selling multiplier, letting you earn more money when selling mutated Shells at the shop. However, every mutation has a different drop rate, making some far rarer than others. Use our guide to learn about all Shells mutations, their selling multipliers, and the best ways to increase your chances of getting them.
Shells Mutations List and Their Multipliers
The amount of time you pull mutations on Shells depends on the mutation multiplier stats on your tools. That amount improves when you roll the right Shells traits on your tools. That being said, here is the base stat of every mutation in Shells:
| Mutation | Multiplier | Mutation Chance |
|---|---|---|
 Shiny | 1.5x | 19.892% |
 Foggy | 1.1x | 13.562% |
 Frozen | 1.5x | 10.85% |
 Spectral | 2.5x | 9.042% (only at Night) |
 Shocked | 1.6x | 9.042% |
 Glowtide | 2.2x | 8.137% (only at Night) |
 Radioactive | 2.5x | 8.137% |
 Scorched | 1.7x | 7.233% |
 Stinky | 0.8x | 4.521% |
 Dreamshell | 3.2x | 3.617% (only at Night) |
 Cursed | 2.6x | 3.617% |
 Pearlescent | 3.5x | 1.808% |
 Divine | 5.5x | 0.452% |
 ??? | 7x | 0.09% |
 Lunar | Unknown | Unknown |
How to Increase Mutation Chance in Shells
Now that you know about all the mutations, there are certain steps you can take to improve your chances of getting them. Here are all the possible ways you can use to get Shells mutations faster and make more money through their multiplier:
- Use better tools: The best way to improve mutation chance is by getting better tools in the game. If you inspect the stats of your tools, you will notice the mutation multiplier stat. The more this stat is on your tool, the better chances you will have of getting mutations on a shell.
- Roll mutation traits: Apart from getting good tools, you can also reroll traits on them. Some of these traits increase the chance of mutation obtaining. Use the Shells codes to gather pearls or lucky rerolls.
- Charms: There are certain charms or totems you can purchase from the traveling merchants. Using them improves the chance of getting mutations on shells.
- Events: Some mutations are only available during limited-time events. While a few can naturally appear during the night cycle, others are locked behind special admin events and cannot be obtained normally.
That ends our ultimate Shells mutations guide, including the multiplier each one provides. Before you go ahead and sell the mutated ones, make sure you check if they are used for quests.
The rarest known mutation in Shells is the ??? mutation, which has only a 0.09% drop chance and gives a massive 7x selling multiplier.
Yes, mutations directly increase the selling value of Shells through their multipliers. For example, a Divine mutation gives a 5.5x value boost, while Dreamshell increases the selling price by 3.2x. The higher the multiplier, the more Shellings you earn when selling the Shell.
