Killshot

I would remove all 4 Hideous ends, both Perilous Myr, and 2 Galvanic blast to make it 60 cards. The hideous ends can go to sideoard if you feel the need, but they only really benefit a mono-black build of this, because with access to red you can kill pretty much whatever with the burn. Those 2 galvanic blasts wont be needed with 14 other sources of burn. And Perilous Myr is actually weaker than you think, as he must die to do his job since his attack power is a mere 1. Staggershock is also a good burn spell because you can get 2 counters off of it by the rebound. I would probably run 4 burst lightning, 4 lightning bolt, 2 or 3 staggershock and 2 or 3 volt charge. The weakness of volt charge is that the proliferate effect is only good if you already have 1 counter on your ascension when you hit them with it, as the first counter only comes in at the beginning of the end step. For crystal ball and tutelage, you need to see which performs better at getting you the pieces you need faster and probably fit a 3rd copy in. You may even find that one sucks and just replace it with the other one all together. The other cards I recommend are Lavaclaw reaches and Ember Hauler. Lavaclaw reaches can get the 2 damage in when your side of the board may not have anything else to do it with, as well as provides both color lands or a blocker when needed. Ember Hauler is good because he can swing 2 damage on your turn for a counter, then be flung at them on their turn for the 2nd counter. And remember, since red and black have trouble dealing with enchantments, RATCHET BOMBS IN THE SIDEBOARD :)