The Vilefiend Spire

The Vilefiend Spire is a dungeon similar to the Underground Vilefiend Spire, but with many more floors. (see here the guide for the Underground Vilefiend Spire)

To participate in the Tower of Beasts, you must be at least level 31.
Since the update from X-Legend, there are no longer fixed entry times — you can now enter the tower at any moment.
Once inside, you have 3 lives.
Each time you die, you are expelled from the tower and must re-enter to continue your progress until all respawn points are used up.

The Vilefiend Spire has a total of 30 floors.
Some can be done solo, while others require a well-prepared group for an optimal run.
Various collectible items, as well as ring and cape formulas, can drop here — making this instance particularly worthwhile.
On floors 20 and 30, you can obtain the following titles: Heavenly Slaughter (20) and Time and Space Chaos Terminator (30).