one thing i dont get is, these guys used to be in school, how does someone get so strong that he can one shot a lion? or do we assume that everything is exaggerated like senkuu counting how long he was petrified etc

of course tsukasa had to be evil at least until there is a greater evil and they have to eventually combine their strenghts, and yeah the depth of this series is great, i would definitely id go with senkus vision of the new world, im excited to see, how that civilisation is gonna be acomplished