"Look, I know you are more than capable of just summoning a monster to fight for you. I'm sure Devel and Helioc also know this but they aren't saying anything because it doesn't change the situation. However, what I'm about to tell you might change it, after all, it's not like you will be at a disadvantage." - Nina
"Alright, tell me before the two idiots down there die." - SanShiGo
"The monster's weakness also happens to be one of its greatest strengths, the Separation skill. From what we have seen, the monster can detach parts of his body away from each other but it can also split itself in half, which means there isn't a limit on the 'way' it separates. We also don't know if there is a limit to the number of times it can separate, or why it doesn't choose to just keep separating instead of taking the attacks.