Caller of the Void bug?
When caller of the void is copied with Shadow Image, at the begin of the owner of the clone's turn, 1 damage will be dealt to them and not the owner of the original caller of the void. I doubt this is intended. I have not seen if this same thing happens when Caller of the void is stolen with Puppet Master
I have tried to reproduce this, and it worked as intended (thanks to MNM vs Smarties for lots of test help). If it happens again, could you take a screenshot please?