Eelskin
Eelskin is a soak mutation which gives resistance against stab, slash and electric damage.
In order to get the Eelskin mutation, you must first take Snakeskin.
Location
Eelskin can be found outside of the Kraken's Cave, a warning though, if you attempt to kill the Kraken, it is pretty tough, so try and steer clear if you're a newer player.
Effects
This mutation grants:
+2-2 electric resistance +2-2 stabbing resistance +1-2 slashing resistance +3 to Swim
Advantages
This mutation mildly increases chances of breaking out of a hold, so if you're grabbed by something, you have a better chance of breaking free.
As well as this, you have to piss fifty percent less than you usually would.
The speed penalty is removed when underwater for all melee weapons, so you will effectively swing as fast as you would on ground.
You can also breathe underwater, as if you were wearing a scuba tank, artificial gill or the like.
Disadvantages
The break out bonus is tiny and underwater areas are scarce, making this probably the least useful tier 2 soak mutation.
You become thirsty fifty percent faster.
Appearance
This mutation adds the following line to a character's appearance:
%P skin is shiny and slick.