Alistair's Ghostly Disguise

You make yourself--including your clothing, armor, weapons, and other belongings on your person--appear translucent like a ghost. Any mundane or magical disguise (like disguise self) applied to yourself is also affected by this illusion. Your ghostly form may have a pale coloration or just be a muted version of your normal appearance.

The spell does not actually make you ghostly or provide any incorporeal abilities. If you choose, the illusion can make you appear to float slightly above the ground, though you are actually still on the ground.

To discern that you are disguised, a creature can use its action to inspect your appearance and must succeed on an Intelligence (Investigation) check against your spell save DC.