Here's just some ideas of the killer floor, not sure whether this is too crazy, or that this would work? O_O c(= . For laughing coffin, I believe our characters haven't marched into their headquarters yet, if I weren't wrong, so they aren't completely eradicated and still have a significant amount of influence there. Perhaps the leader of Laughing Coffin, PoH, will make his move? o.o
The Floor of Greed
A floor that has a sheer rise of difficulty as compared to the previous floors, overwhelming clearers & even normal players who are familiar to the styles of the previous floor. The floor was bigger than the Floor of Beginnings [1F] . The main town is a snowy area, towards South is a Desert Area, and North being a Coastal Area. Due to its landmass, there is an abundance of resources along this floor, thus the floor name
The boss dungeon, on the Eastern side, is a partially-floating island connected by a single bridge, commonly known as "The Bridge of No Return". The entire dungeon is an anti-crystal zone, and there are 3 paths towards the dungeon: Land, Sky or Sea. Land is the path with no prerequisites, but the most dangerous. For Sky or Sea route, one must slay a boss mob of that region before even gaining access to that route: the Flaming Dragon of the Desert or The Whale of the Coast (One is able to gain a dragon/whale pet if they defeat the boss).
As for the Land Route, its to cross the Bridge of No Return. In the middle of the bridge, an old man NPC would sell "lifelines", but at an exorbitant price of around 20-50 million credits. The bridge leads straight to the boss room, at a highly disadvantaged position of being at a lower ground from the Boss, Leviathan. Most clearers would meet their end at this point from one swoop from the leviathan, except for the very few who managed to afford a lifeline which the NPC would block that boss' attack and give the clearers a chance to escape, or the strongest few who is capable enough to survive the attacks. Thus, its generally safer to fight an stronger than average floor boss on an even ground with a sky/sea route, even when there is a need of an additional boss.