Part of a high level dungeon I created, loosely base don the same tower from Final Fantasy 1. The tower was created by the gods to test & forge people into heroes, being granted legendary weapons at the top. As such, each floor is basically it's own pocket dimension with it's own rules & types of enemies, and there is often powerful magic that can hinder or restrict the players. Each tier is meant to take one adventuring day, with 2 short rests and a long rest.

Tier 1 is the first five floors (they had a simple floor to enter the castle & start climbing). Here are the notes, rules, & themes intend for each floor.

F1: standard dungeon floor, lulled them into thinking this was a standard dungeon. Set the tone for traps & the dungeon being magical.
F2: jungle, wide open (not inside a castle), filled with beasts & dinosaurs. Rooms are separated by tall walls that can't be scaled, but they can fly over them.
F3: Wind, takes place in the open skies with a storm above & below, connected via walkways (not hallways). Aside from a few closed off rooms, the entire floor & it's walkways can be navigated by flying. Features flying enemies & air creatures.
F4: Fire, entire room is within a massive cavern, no walls, but powerful heat prevents flying or moving outside of the rooms/walkways. Fire enemies.
F5: Ice, made of solid ice & houses cold enemies. Regular dungeon floor made of hallways & rooms. They were meant to fight an ancient white dragon as the boss & take a long rest on the 6th floor (no map for it).