I personally like writing him with a generation gap with harry but you are right there is an inconsistency in my story since in the chapter titled school I have written him being a second grader hence I will change it Thank you for your constructive criticism

Lily was revealed to have been proficient in transfiguration. When home from Hogwarts for the holidays, she "turned teacups into rats". She also transfigured a lily petal into a fish, which Slughorn described as "beautiful magic, wondrous to behold".

The hatred of the houses began with Gryffindor and slytherin themselves in which slythein hated muggles for burning his kind for hundreds of years to the point of even burning babies which had caused more dark wizards to be born and gryffindor slaughtered many dark wizards and had no problem with muggles.