Eragon vs. Harry Potter Xover
Disclaimer: I don't own the Harry Potter series or the Inheritance Cycle. Original credits to J. K. Rowling and Christopher Paolini.
Eragon sensed a powerful magic user pacing three times, thinking "I need a place to battle a mighty foe". Eragon realized that the person he sensed was none other than Harry Potter, the powerful wizard who defeated the evil Lord Voldemort. This he knew because the Eldunarí spoke of him during the trip from Alagaësia. Suddenly, Eragon's mental connection vanished.
Harry felt a vast, immensely powerful being touch his mind, not unlike his own excursions into Voldemort's mind, except both Harry and this unknown person were aware of the contact. He checked the Marauder's Map, and assured himself that Voldemort was indeed dead, then scanned for any people he did not recognize. He saw a person called "Eragon Shadeslayer" and realized that was the person Hermione was talking about, he who slew the tyrant Galbatorix. If this guy was as strong as Hermione said, than he was in trouble. Luckily, he hadn't returned the Elder Wand to Dumbledore's grave yet. He went to the seventh floor corridor and thought with pressing urgency "I need a place to battle a mighty foe". On his third time past the apparently blank wall, a majestic door appeared, and his went through.
Eragon learned fast, so he went to the wall and thought I need a place to battle the one called Harry Potter. The wall turned into a grandiose door, and then he stepped through.
As Eragon stepped through the door, Harry immediately lifted his wand, and asked "Why are you here, Shadeslayer?" Eragon drew Brisingr and answered "I sensed a powerful presence, and I wanted to test you to find out your capabilities." Harry then cast the Full Body-Bind Curse, and Eragon was immediately immobile. Eragon reached for his magic and said "Brakka du vanyali sem huildar eka!" Harry's magic dissipated, and Eragon was free to move. Eragon used the Word, and shouted "Brisingr!", so as to not ignite his sword. Harry said "Protego!" and the fire hit a transparent shield and sputtered out of existence. Harry went on the offensive again, and used a Stunning Spell, and Eragon dodged it and struck at him with Brisingr. Harry again used the Shield Charm, but Brisingr could cut through any enchantment, and slashed Harry, cutting deep into his shoulder. Harry yelled "Sectumsempra!" and slashed Eragon as well. Harry muttered "Vulnera Sanentur", and healed the gash, while Eragon did the same with "Waíse heill". Eragon slashed at Harry's legs, and Harry jumped back and yelled "Expelliarmus!". As the spell affected him and not his sword, Eragon involuntarily let go of his sword, and thought "Malthinae" and returned the favor to Harry's first spell. As Harry lay paralyzed, he non-verbally used the counter-curse to the very similar Full Body-Bind Curse. Fortunately, it worked, and Harry was free to cast another Stunner at Eragon. Eragon jumped back, grabbed Brisingr and blocked the spell. Harry cast "Incendio". Eragon thought Foolish boy. Fire is my element. Eragon said "Brisingr letta. Thrysta." The fire stopped right in front of Eragon's face, then it completely reversed direction and shot right at Harry. Harry said "Aguamenti" and a jet of water flew at the flames. Eragon added a bit of his own magic to the conflagration, and his fire evaporated Harry's water spell and consumed Harry. Before the fire could harm him, he Disapparated (the Room of Requirement allowed it, as he was in combat) Harry reappeared behind Eragon. Eragon had sensed his presence, so he jumped clear across the room, and yelled "Skolir!" and blocked any spells coming towards him. Eragon assumed his fighting stance, and charged Harry. Harry saw him coming and cast yet another Stunning Spell. Eragon dodged it, ran full speed, and flicked his sword at Harry's throat. Harry said "I guess I'm not worthy." Eragon just smiled and said "Of course you are, Harry-finiarel. Few people could best me. In fact, only 2 people rival my power. Well, 3 now. So, I ask: Will you join the new Riders?" Harry said "You honor me, but I cannot accept your offer. I must protect the people of Hogwarts and beyond." Eragon nodded graciously, and left.