Winter's Grasp

Conjuration (Creation) [cold]
Level: Druid * 2, Hunter * 2, Warlock * 2
Components: V, S, M/DF (ground glass)
Casting Time: 1 Standard Action
Range: medium (100 ft. + 10 ft./level)
Area: 20-ft.-radius spread
Duration: 1 round/level
Saving Throw: None
Spell Resistance: no
  Ice encrusts the ground, radiating supernatural cold and making it difficult for creatures to maintain their balance. This icy ground is treated as normal ice, forcing creatures to spend 2 squares of movement to enter an icy square and increasing the DC of Acrobatics checks attempted in the area by 5. A creature that begins its turn in the affected area takes 1d6 points of cold damage, and takes a -2 penalty on saving throws against all spells with the cold descriptor for 1 round.