Massmorph
Transmutation 4
Casting Time: 1 minute
Range: 240 feet
Duration: until dispelled
Components: V, S, M (a handful of bark chips)
This spell transmutes up to 100 humanoids or like creatures within range into plant-like versions of themselves completely indistinguishable from normal trees or shrubs when stationary. Creatures as large as giants can be affected, but cost a proportional number of effects (1, 4, 9, 16). The spell lasts on a target until a transformed target leaves the spell’s area, until dispelled, or until the original caster wills it. Movement within the spell’s area does not end the effect.
Sustenance is like a plant (water and sunlight), and grown bark is as strong as barkskin or has qualities like the plant in question (cacti, etc.).