Terraphage

[Transmutation] [Earth]
Level: [Arcane 7], [Nature 7]
Components: [S], [V], and [F]
Casting Time: 1 Standard action
Range: Close (25 ft. + 5 ft. per 2 CL) @{close_range} ft.
Effect: 15 ft. radius centered on target square
Duration: Instantaneous; variable read text.
Saving Throw: Reflex; partial
Spell Resistance: No

Your character slams their focus into the ground. In the target area, the ground, no matter the material, will quickly form and engulf all creatures. These creatures must make a Reflex save to get out before they are engulfed and take 10d6 crushing damage, Reflex to completely negate the damage. Either way, all creatures within this area must start making either Escape Artist checks or Strength checks against the spell's DC every round until they are broken free. Until they are broken free they cannot leave their square. Another creature that is not trapped can spend a full round action to free a trapped creature.

VTT Macro Description:
@{character_name} slams their focus into the ground. The ground in the target area will quickly reshapes itself to engulf all the creatures. On a successful Reflex save, they avoid the damage, but they will remain stuck in the ground. A Strength check or Escape Artist check against the spell DC will let them break free.