Binding Earth, Mass

Transmutation [earth]
Level: Druid * 6, Hunter * 6, Warlock * 6
Components: V, S, DF
Casting Time: 1 Standard Action
Range: close (25 ft. + 5 ft./2 levels)
Target: one creature or object/level, no two of which can be more than 30 ft. apart
Duration: 1 round/level
Saving Throw: Fortitude negates
Spell Resistance: yes
  If a target of this spell fail their Fortitude Save, areas of earth and stone floor act as a snapping quagmire that pulls them down and damages them if they attempt to move through such terrain.
  If the target is a creature, it treats all areas of earth and stone it moves through as Difficult Terrain. Furthermore, for each 5 feet a creature moves through such areas, it takes 1d6 points of damage.
  Creatures with a Burrow speed or the earth glide ability are unaffected by binding earth.
  If cast on an unattended Object resting on an area of stone or earth, the stone or earth warps and wraps around it, pulling it firmly to the ground. A DC 15 Strength check is required to pull the Object free from snapping earth or stone.