Beseech

The caster Begs a Archfeind or Archdevil for protection, Making it clear they will pay any price for another moment alive, (this price is higher then the stated Material Components, often involving a promise or side quest the creature demands as payment)

The caster gains 20d6 Temp Hp, and illusionary armor covers their body increasing the casters AC by +5. and all Demons OR Devils that can see the caster become magically charmed by the caster, (they wont commit permanent suicide, but will kill themselves if they are not on their home plane)

(this spell has additional complications if the caster is a warlock (who does not get their powers from a Fiend) Druid, Cleric, or Paladin)