The Strings of Fate
The four lines of people began moving all at once. The person in front of each line stepped up to the obelisk, and prepared their attack. They only had one shot, so they had to make it count. Commander Lionel had it made it clear no retakes or second chances will be given, with the reasoning being 'the Ghosts won't just give you a second chance'.
Of course, to make things fair for those who specialized in weak but rapid attacks in quick succession, everyone was given a total of three seconds to attack the obelisk. That number was enough for those rapid attack users to use their art properly, while also short enough to prevent those who use one powerful attack from attacking twice.