Does Volkar work on the player controlling him? For example, if I kill/bounce my own unit (somehow) and I control Volkar, can I then put that unit on the bottom of my deck. Let's pretend for some reason I used "Called Back" on my own guy and wanted him on the bottom of my deck, let's pretend I didn't want to be milled and this was my only option. What is the timing, exactly? It sounds like it would go like this: I play Called Back. Opponent does not respond, so the action goes off and resolves. When do I get to play Volkar's action? It seems like I've missed the opportunity, since I can't really respond to my own action (right? RIGHT?!)
Something similar happened a couple of weeks ago. Someone played a tactic and wanted to cancel their own tactic, just to get 2 spells in the discard pile (I think they were playing a version of Mamut's Star Dragon deck that he posted). Anyway, I told them that you cannot cancel your own tactic because in the window that opens after playing the tactic, if the opponent passes, you resolve the tactic. I can't think of a way to cancel your own tactic, so I can't think of a way to play Volkar on yourself either.