Harry stalked away from Severus the moment he was within Hogwarts' grounds. He was quite angry that Severus had cut their father-son day short. Not to mention that it hurt when he snatched his arm like that. Turning around, he saw that Severus had returned to the castle. Perfect. Time to go explore.
Harry sprinted into the sheltered area of the Forest. Turning back briefly to make sure neither Severus nor Hagrid were coming to bring him back, he ran further. He was deeper into the forest than he'd ever been before when he heard something, like the slithering of a cloak across dead leaves, coming behind him. Whirling, he saw a shadowy figure, it's mouth dripping with silver liquid. Giving a yell, he backed away, moving deeper into the forest and further away from help. He heard hooves just as the thing swooped at him. Yelling, he stepped backward, tripped on a root, and smashed his head on a rock. He was out like a light.
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Harry's consciousness returned slowly. For a while he was aware of hushed whispers. Then he became aware of his body, and how his fingers wouldn't cooperate. Then he noticed a compressing feeling around his head, and the fact that something cold was repeatedly sliding down different parts of his face. He forced his heavy eyelids open.
"Harry!" came Severus's voice, and his face came into view.
"What happened?" Harry asked.
"Firenze, a centuar, brought you to Hagrid's house." Severus explained. "What happened?"
"Uh, I was out exploring the forest..." Harry started. Severus sighed. "But this isn't my fault! This big cloaked thingy with it's mouth covered in silvery stuff attacked me! I stepped away from it, tripped, and hit a rock. Then I woke up here."
Harry became aware Dumbledore was in the room when he and Severus exchanged startled looks.
Hagrid burst into the Hospital Wing, making everyone jump and making Harry's head hurt.
"What is it, Hagrid?" Dumbledore asked.
"I just found a dead unicorn." Hagrid said. "There's blood all over, and small drips leading away from it. It looks like someone is drinking it's blood!" Hagrid lifted his fingers, which were covered in the same silvery stuff as the things mouth had been.
"That's what the thing was covered in!" Harry exclaimed, sitting up, and regretting it once his head started throbbing.
Dumbledore, Severus, and Hagrid looked at him.
"You were attacked by something that is drinking unicorn blood?" Severus asked. "That does not bode well."
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