Of course, the one spell that worked had to be one he used on reflex. Between the enchanted (more like cursed) objects and that accidental reveal, the Statute of Secrecy had been completely broken. And Sirius did not care one bit. What were they going to do? Send him to Azkaban?

"Normally?" Sirius could've ended this situation wandless without issue. But he'd already experienced some... issues.

Still, he tried a spell to contain the stapler. Nothing happened.

"Doesn't seem to work here." Or it's Azkaban, his traitorous mind thought. You've lost most of your magic now, Black. Just like--

"I've tried several spells. We'll have to come up with some other..." Sirius watched as the stapler tried attacking him again. The staple bounced off harmlessly. "...Plan."