Well, he'd probably become super powerful. The symbiote could enhance his magic skills and give him some cool physical abilities like super strength and agility. Maybe he could use it to fight the Dark Arts in a whole new way.
It's popular because it combines different beloved universes. Fans of both Harry Potter and another series get to see their favorite characters interact. For example, a crossover with 'Marvel' would let us see Harry Potter with the Avengers. It creates new and exciting storylines that we wouldn't get in the original works.
Well, if Harry got a howler from Voldemort, it might be filled with dark magic and menacing words to unnerve Harry. It could also be a ploy to throw him off his guard and disrupt his focus on fighting evil.
One idea could be that the characters from 'Got' somehow end up at Hogwarts. For example, Jon Snow could be a new student who is really good at Defense Against the Dark Arts because of his combat skills. He might struggle with the magical aspects at first but quickly adapt.
In fanfiction, if Harry Potter got Ginny pregnant, it could lead to a whole new set of adventures. They might have to face the challenges of starting a family while still dealing with the wizarding world's threats. It could also mean a shift in their relationship dynamics, from being a couple to becoming parents.
He would probably become extremely powerful. He could use the Infinity Stones' powers to defeat Voldemort in an instant. For example, the Power Stone could enhance his magic to an unimaginable level, and the Time Stone might allow him to go back and prevent bad things from happening in the wizarding world.
One great example could be a crossover with 'Lord of the Rings'. Imagine Harry Potter and his friends in Middle - earth, facing the dark forces there. Another is a crossover with 'Percy Jackson'. It would be interesting to see how the wizarding world and the demigod world interact. There's also the possibility of a crossover with 'Sherlock Holmes', where Holmes tries to solve the mysteries in the magical world of Harry Potter.
He might become extremely powerful. The Infinity Stones have the power to manipulate reality, time, space and more. Harry could use it to defeat Voldemort in a much easier way. For example, with the Time Stone, he could go back in time to prevent certain events that led to Voldemort's rise or stop him from ever being born.
In a crossover, the dragons in 'Got' could be related to the magical creatures in 'Harry Potter'. Maybe they are a long - lost, more powerful version of a magical beast. Their fire - breathing ability could be enhanced by magic spells, and they could be used in battles against the Death Eaters or other dark forces. Daenerys could learn some magic from Hogwarts professors to better control her dragons.
The discipline would probably change a great deal. McGonagall was known for her strict but fair discipline. Without her, students might start getting away with more mischief. Also, the Gryffindor house would lose its strong guiding figure. The new teacher in charge might not have the same understanding of the Gryffindor values. Academically, her expertise in Transfiguration would be missed. There might be a decline in the quality of Transfiguration teaching.