Upon Utilizing a standard action you spend 1 Shadow Essence, Upon casting this spell anyone within the 45ft cone shape, takes 3d4 necrotic damage , this spell only affects those the caster sees as the enemy, anyone affected by the spell loses 1d4 of their next attack roll, This spell never misses  

Upon Reaching level 5th level the damage increase to 5d4 necrotic damage, range increases to 60ft cone shaped and creatures affected by the spell now loses 2d4 on their next attack roll

Upon reaching 11th level the Damage increases to 7d4 necrotic damage, range increases to 75ft cone shaped and creatures affected by the spell now loses 3d4 on their next attack roll

Upon reaching 17th level the damage increases to 9d4 necrotic damage, range increases to 90ft cone shaped and creatures affected by the spell now loses 4d4 on their next attack roll