Dumbledore was an utterly cruel man. No, actually, words couldn't describe it. But Regulus knew for sure what he was...-

His knuckles hit the wooden door firmly, awaiting access to Dumbledore's office.. Oh, but after the meeting he wish he hadn't. Dumbledore used legilimency on him, which led to a nasty argument; "You flithy mudblood, retrait your fingers from my mind, at once!" Regulus snapped, his voice cold. But, Dumbledore only smiled. "Such flthy words.." And after that, he have bestowed a curse upon him, a vile one. Everytime Regulus would lie to him or tell anyone about the curse, a sharp pain would shot down his whole mind, leaving him to pant and to whimper and whine in pain. Dumbledore glanced at Regulus, his expression looking quite sirius (pun intended). "If you tell anybody of the curse, Regulus, there will be consequences." he warned. Regulus, the defiant child he was, told Barty about the curse. And Barty being the brightest wizard of his generation, immediatelly found a loophole. They wrote it down and the rest of their friends (the skittles and the marauders weren't that happy to work togheter but they did in the end) worked togheter to try finding a counter curse. After Regulus tried telling Sirius everything that Dumbledore did to him since he came to Hogwarts in a more private room, Dumbledore was happening to pass by. He seemed pissed that Regulus did that, and so knocked out Sirius and Regulus. He woke up, only to be met by his friends in the dungeons. Panicked, he've tried to free the skittles. But Barty had a sprained wrist and 3 scars (lacero's curse masterpiece), Evan's leg had three broken bones and one scar, and the two girls were bruised. Dumbledore was there too and dismissed the girl off to the Hospital Wing, and Regulus along with Barty helped Evan up. Regulus shot Dumbledore a disgusted glare before going away.. Dumbledore disguised himself into Madam Pomfrey using Polyjuice potion, and drugged Barty, Evan and Regulus to sleep.

..- a monster.