After he separated himself from Zodiark he either became a primal due to having been made the heart of one or somewhere down the line became one. Either way do you think he slowly tempers people over time without actually exerting much effort? I feel as though I or someone asked this a while back, but I think many just shrugged it off. Yet we do know that primals can temper people just by existing or even very mildly do so in the case of the Heavensward. Or would he even be able to temper since he came from Zodiark? Who according to Livingway didn't have the nasty tempering component as other primals. And that if Zodiark and Hydelean did it would have been a small "tug". Yet we know the Loporits tend to not the best judges when it comes to size. As what might seem as a small tug in quotes no less to them might actually be bigger than they say it is. As sure the Ragnarok is called a teeny tiny toy boat for laughs it's also not that small. It's just really small compared to say the moon.