Increase one stat by 2 and two other stats by 1

Chimera can technically live forever but after about 100 years their body parts decompose beyond use and they have to eather get new ones or their body will stop working. If their body stops working their consciousness will remain but become inactive until they are eather resurrected or their body is fully destroyed. If this happens then they just cease existing entirely.

Chimera usually lean towards the neutral alignments but can easily be swayed to eather good or evil. Due to their unpredictable nature they often bring chaos with them.

Chimera's size is eather small or medium depending on if they have more parts of small or medium creatures. You can de anywhere between 3 and 8 feet.

You have a 30ft walk speed

Due to your physiology being a hodgepodge of other humanoids or beasts you can chose up to 8 trates from any other humanoid species of medium or small size that do not change your stats, proficiencies, age, alignment, or walk speed. You can also chose 1 feat and Ignore any species restrictions, class restrictions still apply.

You may make a dc 16 medicine check to harvest a body part from the courps of any humanoid you come across. On a success you gain that body part as an item. On a fail the body is mutilated to the point where you can not try again. If you find a already removed part you can just collect it. Whenever you take a short or long rest you can replace one of your traits gained from mishmash with a trait from that creature and you gain a body part from the corresponding humanoid that gave you the previous trait as an item for use later.

At level 6 the dc for the medicine check becomes 13. at level 12 the dc for the medicine check becomes 10. 

You gain proficiencies with 3 skills of your choice.

You can speak, read, and write Common and 3 other languages of your choice with up to 2 of them being exotic.