Responses
Well it was mention that that demon was once a powerful magician who failed to cast a powerful spell. The demons they fought now were once weak so the difference is in power is big however the first demon didn't have any consciousness
The difference in power*
Yes! We finally get to see Gramps and Granny go at it! And the fact they're breezing through it while the others had such a hard time... just how strong WAS the first demon (the one they fought in their youth)?