When two dergons with a shared individual in their lineage are bred, their offspring will have an inbreeding coefficient (Coi) present in their Health field. This is calculated by adding a set number for the positions of the duplicated ancestor (i lost the numbers for rn but they're coming), and will be passed down with the dergon's offspring with the same generational degradation as CoAs and CoRs.
Penalties share the same chance of occurring as their Coi, and can be Mild with a Coi of .15 or below, up to Moderate with a Coi of .16-.25, up to Severe with a Coi of .25-.5, are automatically Severe above .5, and suffer a chance for a second penalty with a Coi above 1.Â