Some suggestions for floors 51-200.
Floor modifications items:
Tome of the Void: The next floor is filled with a deadly mist and a moggle has come to aid you by holding an aether lamp to create a small aoe where you and your party is safe. The moggle follows the leader and if they die follows the next player on the list. A slight nod to the Crystal Chronicles game on the Gamecube.
Tome of Trials: The next floor has no enemies but the gate is locked until all floors have the corresponding matching color. Entering rooms in specific orders changes the colour. A slight nod to Cave of Trials from Star Ocean 2.
Edda's Lock of Hair: The next floor is filled with double the amount of chests however an ominous presences stalks the floor. Increased chances of silver chests and potshed items but Edda slowly wanders around and is lvl 99.
White Finger Glove: The next floor will be empty except for one strange witch. A shop floor where you can buy exclusive items and/or upgrades for your aether armor from Welch.
Demon Void Brick: The next floor will be a hallway with a Demon Wall. Defeat the Demon Wall to obtain treasures hidden behind it.
Heavy Feather: The next floor will contain heavy hatchlings. The players must gather and round up all the heavy hatchlings before the Fat chocobo will move from the gate.
Black Stone: Next floor is completely dark except for a small light aoe radiating from the player. Other players cannot be seen if they are in a different room. Map is N/A.
Wood Wailer Whistle: Next room creates a save point.
Player Modification Items:
Large Aether Crystal: Makes player size larger and deal more damage. Duration 1 min.
Broken crystal: Changes actions and traits to that of another job. Can only change between jobs of the same category, ex tank, melee dps, ranged dps, healer. Duration 1 min.
Smoking Void Crystal: Makes you invisible to enemies. Duration 1 min.