Smoke ladder

Cloud ladder, also known as smoke ladder, was a common spell used by wu jen in Kara-Tur that molded smoke into a functional ladder. The spell was very rare outside Kara-Tur.

Effects
With this spell a wu jen was able to create a ladder of or more. This ladder was always rigid, and weighed almost nothing. The ladder was steady and required no support. Only one creature at a time was able to climb the ladder. The spell could also be cast on an existing ladder, which increased the duration of the spell. The summoned ladder lasted until the wu jen ended the spell or until the spell expired.

The spell could be used inside the atmosphere of a spelljammer but was unable to create a ladder in the void or Phlogiston.

Components
In addition to verbal and somatic components, the spell required a material component, the smoke from the fire of burning green wood.