Personally, I'd up the costs by one, and have it also affect creatures that have been generated. (Queen, Pharaoh, Fate Egg even.) I think 2 is just a bit too little to play a card like this, considering your deck would be designed around this to begin with, 2 just isn't significant. This card definitely shouldn't affect both players, otherwise it doesn't do anything to benefit you in most cases. Another thing to note is that it goes well with miracle. Playing this guarantees that the opponent won't do extra damage to you. (Aside from weapons.) so you don't have to use a miracle a turn sooner to be safe, which could be a difference in many games where you actually need miracle.
Fractal will be slowed by this, but a turn really isn't anything to worry about with that many creatures on the field, plus Procrastination was already a slow down to Fractal. This with Procrastination might be enough to kill a lot of decks, creatures doing only half the damage they should be, and being slowed by a turn. Not sure if it's really OP, though, since you do need this and Procrastination, and damage yourself, as well as quanta. Just something to think about.