[OmikronWarrior]

2. The first part is easy. The spell targets the largest creature on the battlefield and assigns a "horror mark" level. Every additional casting increases the horror mark level by 1. That being said, the horror mark level is unknown during play. Furthermore, I know of no one who can tell you odds of getting attacked by horrors any given turn or which horror based on horror mark level. I will say it seems to take more than one guy spamming it throughout the battle to be effective.