In hindsight, snooping around Regulus' room was a bad idea. That's putting it lightly.

You walked into his dorm, just trying to pass the time until the boy got there. Plans of flying a lap around school grounds quickly changed when you noticed a strange-looking notebook on his desk.

Not paying much mind to it, you pulled the cover aside. Weird names, weird numbers. Was Regulus messing with runes again? You told him not to. This boy.

Then a weird spell caught your eye. Morsmordre. It sounded oddly familiar. You've read it somewhere before. You hummed to yourself, flipping the page.

The next page contained a list labelled "Safe houses". Huh? Why would Regulus need those?

You flipped the page, and then your blood ran cold as the realisation set in.

The page was filled with assignments, almost like a to-do list, but it was full of "torture", "kill", "leave alive".

Morsmordre. The spell used to conjure the image of the Dark Mark. Of course. So Regulus...

"Ah, you figured it out," you heard the voice from behind you. You turned, horror and betrayal in your eyes. Regulus was standing at the door, trying to seem cold and aloof, but his eyes gave his shame and guilt out.