Harry a God and traverses Hogwarts and the realm of Gods. Harry also had to find a practical way to become immortal in a decade or else his soul will be more spilt up than Voldemort's. So it's a race against the clock to become immortal and to try and keep it hidden that he's a Minor God while homicidal serial killer with a God Complex tries to kill him. Not pairing Harry yet.
What can Harry do with a painting, a secret room and library ... many things. Harry is a 'Visper' a hybrid between Elf and/or vampire, incubus, faery or veela. Vipers are ever powerful and rare so can Harry handle this ultimate power.