Divine Revelation

You whisper out a prayer and from the quietest words comes a divine storm. Choose any number of creatures within 30 feet of you. Each creature chosen this way regains 7d12 hit points. Then choose any number of creatures within 30 feet of you. They must each must make a constriction saving throw. On a failed saving throw, it takes 7d12 radiant damage, or half as much on a successful save. Undead and Fiends that are reduced to 0 hit points this way are reduced to ash. 

In addition, any creatures summoned by spells or reanimated by spells that fail the saving throw are banished permanently.