I would like to have a review for this spell and in the first place I would like to have suggestions about the possible level.
Aura of cold
Wizard Lvl: 3
School: transmutation (cold)
Components: V, S, M (special dust 50GP)
Casting time: 1 std action
Duration: 1min/level (dismissible)
Can be made permanent
Extra material to make the spell permanent: Dust of an adult white dragon scales (at least 10).
The spellcaster is surrounded with an extremely cold aura which freezes everything around him. The aura is visible as a blueish emanation centered on the spellcaster. He gains damage reduction 10 against cold and is immune to cold effects. The first round, every creature within 5 feet takes 2d6 + caster level in cold damage. The second round they become numbed (-4 DEX, -4 to hit, half movement, only one std action possible, fortitude save to not drop held objects) The third round they become frozen (see petrified condition). If a creature is no longer within 5ft of the caster, the effects revert at the same speed (i.e., 3 rounds for the frozen status and another two rounds for the numbed status).
The spell can be made permanent with a very body/mind-debilitating ritual: The spellcaster must lie immersed in a pool of ice for five days and each day successfully make a fortitude save at DC 15 + 1/day. If a saving throw fails, the spellcaster takes 1 point of constitution damage for each day spent in the ice-pool so far and the ritual is broken. Due to the straining process, the ritual can't be repeated until a month has passed. If the five days of saving throws succeed, the spellcaster must spread the scale dust over himself and complete the ritual with a permanency spell with a DC 15 concentration check. After the ritual their skin becomes pale and their hair blue-white. The spellcaster becomes immune to cold and permanently loses 2 point of Charisma. This Charisma loss can’t be restored, even with a wish.