From Kamar-Taj to Hogwarts

"Voldemort, I've come to bargain!" Wearing a cloak, Xiwen held the Rings of Raggadorr in his left hand while pressing his wand right against Voldemort's glabella with his right, wearing a genial smile. ...What kind of bargain is this!! A battered and tattered Voldemort screamed internally in utter anguish!

Xiwen was once a genius mage of Kamar-Taj, but his soul was rejected by the Marvel Universe for unknown reasons. With the help of the Ancient One, he came to another world. However, Xiwen was shocked to discover that the magic system here was completely different from Kamar-Taj!

Wait, there seems to be room for manipulation here-

Avada Kedavra + Ancient Body of Hogwarts = ?

Lightning Storm + Bolts of Balthakk = ?

Apparition + Portal of Dimensions = ?

...Let us watch how Xiwen, the genius mage of Kamar-Taj, makes his mark in the Harry Potter world during the era of Grindelwald.