@Kaarme there's a possibility that dragons are actually Gigantothermic, basically they're so big that the smaller surface area to volume ratio make them maintain a costant temperature despite being cold-blooded
"I could rip his head off and be done with, but no, let's make him become a super powerful zombie I have trouble handling" and that's the guy who lived 10 years in a zombie world.
He's an idiot.