Demonic Eggs - A Mammoth's faulty evolution!

Synopsis; - It wasn't easy to birth an industrial revolution through a pair of butt-cheeks, it was especially difficult for a 'mammoth man' in pre-medieval times! But... there was a perk to his favour. After a vile mutation and numerous cancers, Gustav could now lay eggs in exchange which advantageously, hatched demons! Putting those various demons and their skillset into use, he had to build himself some prime defenses. Countless civilizations of aliens were after him, and he was yet to determine which one was worth cooperating with; Survival was a manipulative path, but his unique guts were surely prized! Notes; - While you wait for updates, a similar story of mine awaits you. Go read my novel 'I'm a Snake?' right here in the app! - This is my first sci-fi novel, and I will try my best to explain the technology. However, do expect some slight fantasy elements, as I can't narrow everything down haha! Other tags; Space exploration, base building, spaceships, science, galaxies, light smut, harem, non-human, non-human MC, non-human side characters, demons, demon heritage, aliens, expansive ancient history, IQ, experiments, mental experiments, shape shifters, two body forms, three body forms, OP characters.