Spire

A Spire is a type of tower in Purple's Totally Tubular Towers. And it only contains 3 floors. There are only several Spires in-game

Realm 1

 * (SoAZE) Spire of Absolutely Zero Effort (removed, deconfirmed)
 * (SoGO) Spire of Generic Obstacles

Unknown

 * (SoCK) Spire of Conclusive Kindness