I'm trying to poke holes in what the author is trying to do, but with that bullshit ruler cheat of his, the worst thing that could happen is that one of his future supergoblins dies with no heritor, and even then he'd presumably have dozens more to replace and avenge the deceased. After all, he might have a few shrewd individuals recognizing the threat the MC represents, but if those are defeated or made into allies, the world as a whole probably wouldn't recognize a goblin tribe as a threat until it's far too late. It's a pretty clear path to global domination if he so chooses, barring anything even more bullshit than him.