Decimation of the Night

the sun will flicker and fade as the moon appear in the sky in an unholy form sending the minds of those in the moonlight into total madness as their minds and souls are twisted and melted within. the power of akshord consumes them.
The caster takes 2 rounds with no other actions of any kind or movement if the caster is attacked they must make a DC 15 Constitution save or the spell fails.
When the spell is cast all creatures exposed to the sky must make a DC 20 Wisdom save on a fail creatures will take 40d12 necrotic damage and 20d12 psychic damage as well as applies the frightened effect to all in its range until exposed to sunlight. 
Note: trees do not count as cover only solid surfaces.