Creatures Caves

i am thinking about working on making a new breed. base idea is the ability to gain increase in starch and fat from hits. decrease gain and punishment from eating food and fruit. neutral gain from eating critters.
maybe immortality.
new graphics, of course. new poses, arms up type things.
i generally use c2, for the graphics.
i wonder if there is a way to force a norn to live past zeroed out health?
in c2, if a geat, ettin, or grendal slot is used for a norn, can that norn breed with other norns?

i have recently tried to make a mongrelmen norn, with high mutability on appearance and pigments, but i found the children mutations seem to only use the clab slots, instead of any of the 3rd party slots. anybody can think of a workaround for that?

also, this is a long range idea i could never do alone, but what about a superhero total conversion? each breed could be a different type of super, i.e. vigilante, alien, mutant. graphics could be different types of masks, capes, spandex. ettins could be civlians, and grendels could be villians. pigment mutation high. crossbreeding would generate different combinations of types and graphics. can you imagine?