Don't Panic: A Wizard's Guide to Westeros (HP × ASOIAF)

That evening, after a day of freezing himself trying to scout by broom, Harry sunk back into his armchair and took a moment to watch the crackling fire. Finding a bit more energy after some rest and a cup of good British tea, he turned to Dobby, who was also splayed across an armchair looking pretty exhausted.  

"Dobby, I think it's time we start properly testing our magic in this world both Wizard magic and Elf magic. We need to know what we can rely on and what might be different." 

Dobby nodded, not quite ready to get up yet, but interested nonetheless. "Dobby is ready, Harry Potter, sir" he said, not really looking ready at all, "What spells should we start with?" 

"Let's begin with some of the basic ones – Lumos, Stupefy, and Protego," Harry suggested as he stood up. He began by casting a simple Lumos, his hand immediately lit up with a bright, steady light. He couldn't help but notice that the light seemed more vibrant, as if the magic in the air was amplifying its intensity. 

Next, he tried a Stupefy, aiming the red spell at a nearby rock one of the elves had inexplicably dragged inside from their explorations. The spell struck the rock with a powerful force, leaving a small dent in its surface. Harry's jaw dropped at that. He'd never seen a stupefy have a physical effect before, it only pushed people back if it was overpowered. To chip away at a rock suggested even greater power by an order of magnitude. 

Encouraged by these initial successes and now feeling somewhat more excited and energetic, he proceeded to cast a Protego.  

A shimmering, translucent shield appeared before him; at a glance the shield seemed thicker, and more opaque than usual, as though it was denser. It also covered him in a complete dome, where it should have simply formed a half-body shield in front of him.  Harry was speechless for a moment, before breaking out of his stupor and smiling like a loon. "Huh... ... there's definitely something to this thicker feeling of magic in the air... ... fun!" he declared to no-one in particular. 

Harry looked to Dobby with a mixture of surprise and excitement. "My magic seems to be doing more than just working, it's practically thriving here" he stammered, "But there's something different about it, too. It feels raw and unrefined, like the spells themselves are less polished." 

Dobby tilted his head, deep in thought. "Perhaps the magic here has a wilder nature, Harry Potter, sir. I's be hearing once that magic be more refined in our time than Merlin's," Dobby reflected, making a surprisingly poignant observation, "refined by all the seasoned magic users and magical peoples on Earth." 

Harry nodded, contemplating Dobby's words. "You might be right. Let's try some more advanced spells and see how we fare." 

Harry decided to test the wizarding Disillusionment Charm, having already used it earlier in the day, but not having taken much note of how it's effect might have differed from the norm. Harry cast the spell on himself and felt the familiar sensation of an egg cracking on his head and trickling down as he began to blend into the background. 

"How do I look Dobby? Can you see me?" he asked. The house-elf easily pointed him out, chucking a small cushion at the human shaped camouflaged Harry moving about the tent for added emphasis. 

"It seems the Disillusionment Charm isn't any more or less effective here, it still works, and we'll still be able to use it to keep hidden" Harry reflected, "but despite the greater amount of magic in the air, the charm doesn't seem very different. Though the magic feels less refined when it's cast, much more primal and natural, and it seems to take a bit more willpower to form into the desired effect." 

Harry mused after a bit more testing, a hint of disappointment in his voice. "And the Silencing Charm seems to be more of a sound dampener rather than completely silencing, though with a bit more power it seems to work properly. It's like the magic is happy to do what I want, but the path it usually takes is a bit more rugged, and less well trodden; I just need to push a bit more to get there. I'm not ready to test Apparition yet, but I have a feeling it might be affected as well, and will require great care." Harry had no interest in splinching himself in a world with no St. Mungo's.