Reddit reviews Mage: Sorcerers Crusade (Mage the Sorcerers Crusade)
We found 2 Reddit comments about Mage: Sorcerers Crusade (Mage the Sorcerers Crusade). Here are the top ones, ranked by their Reddit score.
Used Book in Good Condition
First thing is since HP is essentially earth, you can already borrow from all your favorite myths and superstitions; djinns and ifrits in the deserts of the middle east, giant jungle beasts of the darkest reaches of the congo, romanian vampires, fuckin' atlantis.
Of course if you want to keep it in (edit: the regions where the story takes place), the forbidden forest, before it was reduced to a magical creature sanctuary could be insane, a massive sprawling wilderness, a magical biome with its own civilizations, warring factions, caves and dungeons, etc.
I'm gonna be honest though, if you want to adapt a role playing game to the harry potter universe; instead of D&D I would highly recommend using "MAGE : THE SORCERERS CRUSADE"
https://www.amazon.com/Mage-Sorcerers-Crusade/dp/1565044894 - Used copies start at $11
If you like World of Darkness, check out Mage: The Sorcerer's Crusade. It's set in the late middle ages/early renaissance, and while it's designed for low fantasy, there's no reason you couldn't ditch the setting and just use the rules.
They've tweaked Paradox a little to fit the setting's warring paradigms, but aside from that it's basically the same as standard Mage.