There ought to be artifact or experimental cbm’s, which of course are just artifacts that you can install into your body. Part of the cbm loot tables only super rare or located in chained up lab vaults with warnings begging not to be used. Here’s why you would gamble on them:
-Like artifacts they can be extremely powerful but always a double edge sword
-Can be self-installed, but cbm is permanent which could be a godsend or curse. (cant remove)
-Don’t need anesthetic kits, but self-installing causes a lot of pain.
-The risk comes from not knowing what it does til installed. Adds gambling element.
-Perhaps can be chosen as starting trait.
The idea is to give the player a rare chance to find one of these artifact cbm’s, and being able to install it anytime, but doing so will be a huge gamble. Although negative could be bad, the chance at getting something very useful permanently could be fun or save your life in a bad spot. Lore wise I can imagine dark, twisted entities have corrupted or fused with these cbm’s turning them into artifacts.
I like the gambling element this would be bring to the table, and unlike using mutagens you can’t just use purifier to fix bad luck.