Burning aurora blade

The spell creates a spiral of syphoning flame around the blade that stretches 60ft in the air, the spiral creates an aurora borealis affect in the around the caster. The spell consumes the ruby, the target(s)must make a dex save against your spell save dc or take full damage or half of all damage on a successful save and not be blinded. The spell does 1d10+40d6 fire+40d6 radiant, the spell sets fire to any flammable items on the target(s) the fire does 1d20 damage each round, after casting the caster must make a dc 20 con save or die, on a successful save the caster is incapacitated for 24 hours and their max hp is left at 1hp until removed by a greater restoration or a wish spell.