[quote=@Ryonara]
This is my way of having Ebon help, but yes. He's going to do this to blackmail Shiro. 

Heck, you can have Seraph torture Shiro if you'd want. Ebon is just going to keep looking for those daggers while you fight for your life, and take them while you're busy. And even if Shiro somehow survives he'll never find those daggers because Ebon will have them.
[/quote]

I'm not an expert on this by any means but uh...pretty sure you start getting the teacher's involved at that point and risks of getting expelled if the target of the blackmail does the logical thing and tells on you.

And telepathy well, unless the other person is a telepath the only way to hear their thoughts is to get inside their head. Having an entirely different person poking around in somebody's head is bound to catch their attention.