@ author:
was there a time when you have already (technically) won but the lack of removal for the persecutor didn't allow you to win, or it gave the opponent a chance to win (or he did actually win) before you could remove it yourself?
thanks
while it was fortunate that there wasn't in any of the recent tournaments which i joined, it still happens during play tests. it is something i believe you need to accept the moment you put him in your deck... but you should also take note that it is highly unlikely that the persecutor is kept very long in the battlefield by an opponent (unless he knows he is winning anyway). if you manage
to fight against it quite several times you will realize that you would have to eliminate it yourself- either to push an attack without the demon defending or protect yourself not to have 0 or less life (otherwise all creature elim cards just ends the game). it is very rare that an opponent would leave it unchecked, and just rely with prayers that the controller has no means to get rid of it.
the good thing about the persecutor is that it is so big that direct creature elim/wipe aside, it draws card advantage and a favorable board position for the owner. the minimal cost of summoning it makes it also easier for you to trade especially if you think that it is to your advantage- eg. blocking a putrid leech even though you know there's likely a bolt in your opponent's hand, in which you are up by one card and 2 life. if your opponent used path to exile on your demon then it is not too bad, you get a land and more mileage with your thrinaxes.