Sustaining Shelter

Classes Technomancer 2, Witchwarper 2
  School transmutation
  Casting Time 1 minute
  Range close (25 ft. + 5 ft./2 levels)
  Area 10-ft. cube
  Effect magical shelter
  Duration 1 day/level
  Saving Throw none; Spell Resistance none
  You gently coax the surrounding terrain into a defensive dome capable of protecting you from harmful environments. This simple shelter has a single entrance, no doors, and occupies a 10-ft. cube. For the duration of the spell, the shelter provides environmental protections as if it were armor, using your caster level as the item level of the armor.