Is Harry Potter pure blood or half blood. James and lily were both wizards but lily was muggle born so...?
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Harry was a half blood because lily was muggle born.
HALF BLLOD FOR SURE
HalfBlood
To be a pureblood, your parents and grand parents all have to be magical. So, Harry is a half blood because Lily's parents are muggle, but Harry's kids are purebloods. The farther back a family tree goes without a muggle or ill-concealed squib or blood traitor, the more influential and respected the family is, which is where the Sacred Twenty Eight come from and why it didn't include the Potters.