(Trigger icon- mention of self-injury)

I have a little called Fox who seems to greatly enjoy drawing. Now I have nothing against drawing... but he always draws on the walls. At first I just thought this was because he didn't have paper, but I carry a paper and a pen with me all the time now, and he won't draw on the paper, he'll draw on the nearest wall. It's a pain to wash off, but now it's gotten worse.

Fox just used to draw little stick figure animals, which was bearable but annoying, but it's taken a turn for the worse. He draws really really triggering things now that scare me, and really worst of all he now sometimes cuts us and tries to draw on the wall with blood, even when there's a pen around. I've tried putting all sharp objects and pens away, but then he ends up hurting us some other way because he's mad he can't draw.

I've tried leaving notes to him, I've tried buying stuff a little would like, but it won't stop, and honestly it keeps getting scarier and scarier and I'm running out of ideas.