Trying to make a craftable egg

I’m trying to make a craftable egg but anything i try don’t succeed

I’m trying to make a mod where you can have the experimental giga from an egg you craft. It would be craftable in the tek replicator, ask for 500 elements, a fertilized giga egg and 10 mutagens. I would like to make the baby spawn genderless and max server level (225 for exemple).

To be clear, i’m looking for a solution to craft an egg like garuga did in his indom mod, is anyone able to help me about that ?