So, the game has already strayed from nature by making all female hybrids fertile. Furthermore, in nature, male hybrids are always infertile—they may not be able to pass on their genes in Lioden, but they are still fertile.

So, I had a thought—what if these males, who shouldn't be able to breed in the first place, had a bit of a problem when it came to producing cubs? And when I say problem, I of course mean a mutation. My suggestion is this:

These hybrid kings could have a very small chance (like, 1/200) of producing a very rare mutation called "mutated gametes". Gametes are sex cells, for those who don't know. As it is currently, they should only be able to breed with goddess lionesses.

This would be an adult mutation and would have no visible signs, and would be possible on both male and female offspring. This mutation itself would do nothing to the lion, but Mutated Gametes lionesses would then have an increased chance of throwing a lethal mutation (slightly greater chance than cotton root bark, but still very rare). Mutated Gametes males could be used to breed other Mutated Gametes lionesses.

The mutation would be passable at 5% when two "mutated gametes" lions were bred together with a lion scrotum, much like Double Uterus. It would not be passable from a single "mutated gametes" parent.

A mutated gamete male would require twice as much energy to breed, and mutated gametes females would always be born at 1% fertility unless boosted. This would mean that breeding a mutated gamete cub wouldn't be easy, but I imagine they would be very valuable if they increased the chances of lethal cubs, and would give hybrid kings (that shouldn't be able to breed at all, may I remind you) a purpose. Potentially they could even give their own type of lethal cubs, that can only be bred from mutated gametes parents.

Thoughts?

SUGGESTIONS:

- A first-gen hybrid king could have double the chances of throwing a mutated gametes cub, in the same way that a first-gen female has double the odds. So, that would take the chances of throwing a mutated gametes cub from 0.5% chance (regular hybrid king) to 1% (first-gen hybrid king).