Base Class: Barbarian
For the mutant flesh is just a shell. An ever-evolving quickly shifting shell made for constant improvement. Deadly not just because of the way their forms can grow and evolve mutants are known for their speed, and ability to adapt to any situation, land, sea, or even air.
Mold the Flesh
You have practiced molding your own flesh and blood to suit your needs. After 1 hour of uninterrupted work, you can mold your flesh to gain a number of the following effects equal to your proficiency bonus
Mace of Flesh: Mold one of your hands into a lump of flesh, this can be used for a weapon attack dealing 1d8 + strength modifier as bludgeoning damage
Sharpened Flesh: Mold one of your hands into a sharpened blade, this can be used for a weapon attack dealing 1d8 + strength or dex modifier as slashing damage
Spearhead of Flesh: Mold one of your hands into a Spearhead, this can be used for a weapon attack dealing 1d8 + strength modifier as piercing damage (range attack 80 feet with disadvantage + dex mod instead of strength)
Initial Mutation
You gain proficiency in acrobatics if you don’t already have it, if you do you gain an addition bonus equal to half your proficiency bonus
The flesh in your legs mutate and strengthen you gain an additional 5 to your movement speed.
Momentum
If you move at least 10 feet before using the attack action the next time you hit you may add 1d6 bludgeoning damage.
Advancing Mutation
You gain proficiency in athletics if you don’t already have it, if you do you gain an additional bonus equal to half your proficiency bonus
The mutation has advanced, strengthening your arms, you gain a climb speed equal to your movement speed.
You count as one size larger when determining your carrying capacity and the weight you can push, drag, or lift.
Aquatic Mutation
Your feet mutate into webbed fins. You gain a swim speed equal to your move speed.
Your lungs are able to filter water. You can breathe underwater.
Ultimate Mutation
Your whole body horribly mutates
You gain fleshy winged appendages. You gain a flying speed of 30ft
Your ears grow in size and strength. You gain blindsight 20ft as long as you are not deafened
As an action, you cause all hostile creatures that can see you to make a DC 14 Wisdom saving throw or their next turn they must use their next action to dash and move their full speed in the opposite direction from you