The material below is Open Game Content from 3PP Source
Level: Sor/Wiz 3
Components: V, S, M
Casting Time: 1 standard action
Range: Close (25 ft. + 5 ft./2 levels)
Target: 1 creature
Duration: 1 minute/level
Saving Throw: Fortitude negates (harmless)
Spell Resistance: Yes (harmless)
Flatten causes the target and her equipment to flatten, such that she is effectively two-dimensional, having only height and width. This enables her to fit under doors or through any opening as long as it gives her sufficient width. Despite the change the target still has the same weight and ability to manipulate objects that she normally would.
The lack of depth makes the target harder to see at certain angles. She gains a +4 bonus to AC and a +4 bonus to Hide checks. All weapon attacks, including natural weapons, are considered slashing weapons with a threat range of 18-20/x2.
Material Components: A piece of paper or parchment