Blackfire Eruption (Sp)

At 4th level, a Blackfire Adept can sacrifice a prepared spell or spell slot of 4th level or higher, calling forth a searing ebon vortex in the spell’s stead. A blackfire eruption acts as unholy blight, but its maximum damage is increased by 1d8 points (2d6 against good outsiders) per level of the sacrificed spell above 4th. A blackfire eruption ignores the hardness of objects, as it unravels their fundamental reality. A creature slain or an object destroyed by a blackfire eruption is reduced to ash, as by the disintegrate spell. This is a conjuration effect.