Novel info
The Lord of Ice and Magic

In an alternate universe of Harry Potter, Ezekiel Cassian Malverne—a brilliant, ambitious, and powerful heir of the prestigious Malverne family—begins his journey at Hogwarts School of Witchcraft and Wizardry. Born into one of the richest and most politically influential families of the Sacred 28.
*Hogwarts Starts at 13.
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Fanfiction.net : RF Axel