What if there are ties? Also don't you think that using the unnupped in a mono with nova is too much trolling?
Ties get settled by the RNG
Also, note that the effect won't occur until the end of the opponent's turn, so they have their entire turn to use up their highest quanta pool.
It will make life harder on decks that need to stack up very high totals, but I don't think it will obliterate most decks.
The decks that it really hurts are mainly bolt like decks and decks that need to build up for spam rushes.
But I do see a point with nova abuse. I suppose I could change it to only work off the owner's mark pool instead.