So the way the system is going to work it's going to be split up through 3 different sources
Traits-by spinning a wheel he can get traits pertaining to his monster giving him enhancements and they have a rarity
Common-most likely to get one
Uncommon-less likely but nearly the same
Rare-hard to obtain but have good benefits
Legendary-even rarer honestly one of The hardest yet easiest to obtain
Exotic-The second hardest to obtain usually are you stupidly crazy buffs or gives a crazy ability
Deviant-The hardest to obtain usually give you deviant abilities or traits from deivant monster but they are easier to obtain if you have a blood line trait.
Bloodline-a bloodline shared between descendants also has a rarity
Common-sub species based bloodlines
Uncommon-A little less common
Rare-official variant territory
Legendary-literally 0000.8000.5 chance
Exotic-an duel bloodline spin which basically means you get to bloodlines and all of their benefits
Deviant-???!!