[Xietor]

see above. That would not be spamming horror mark to spite an opponent. You are now playing the devil's advocate? Are you in law school?

Obviously if you are going to horror mark a foe before summoning monsters that seek out a horror marked foe, that is not horror marking to spite your foe, but to mark him as a target.

But anyway, it will be up to llamabeast to decide if he wants to ban contestants who are entering just to "spitefully" curse and horror mark their foes. The key word being spitefully, meaning they are not trying to win the match.

But to answer your question, everyone has a chance to win.
you can enter a mage and summon air elementals(or fire water etc). Maybe you will get lucky and only face 1 or 2 badly beat up foes who have no sr protection.