Planar Bestiary
A powerful demon queen of the Abyss bred an army of dual-winged, skull-visaged demons from her own flesh. These creatures, called inexorables, are mostly short-lived. If the situation is desperate enough, they use up their one-time-only ability to execute a single perfect attack against the foe of their choosing. The cost of using their transcendent ability is typically their life.
Inexorables don't impulsively use up their perfect attack, given that their life comes to an end afterward. Instead, they usually save that ability for when they have no other choice. Unlike some demons, inexorables have a sense of self-preservation. At least, that is, until they've had children (which they do by budding). After that, their impulsivity returns.
Bred for war in the Lower Planes against other demons, inexorables know something of fighting fiends. One trick involves feigned fear and obeisance, which they keep up just long enough to surprise their foe. If that surprise comes as a perfect attack, it's all the more effective.
The many layers of the Abyss, especially those where fire and magma predominate, are home to small inexorable groups that have spread out from their birthplace. When the wind is just right, they can even dive into higher dimensions, including worlds of the Material Plane.
Motive: Slaughter
Environment: The Abyss and adjacent planes, solitary or in groups of two to five
Health: 15
Damage Inflicted: Moderate wound (6 points)
Armor: 2
Movement: Short; short when flying
Modifications: Melee attacks, perception, and stealth as level 5
Combat: An inexorable attacks with a flurry of bites and slashes with their sharp wings, which altogether inflict a moderate wound (6 points).
Once in their lifetime, an inexorable can make a perfect attack; the demon automatically hits their target and inflicts 12 points of damage, and the attack counts as magical.
An inexorable is immune to fire and poison attacks.
Interaction: Because they once had a sort of order imposed on them by the demon queen that bred them, inexorables have the potential to follow a hierarchy. Sometimes demons from other parts of the Abyss make an alliance with inexorables, using them as honor guards or in other positions of importance. Praising and honoring an inexorable is an effective tool in dealing with them.
Use: Demons from other parts of the Abyss have made an alliance with a group of inexorables, using them as special-purpose honor guards or in other positions of importance. A mortal wizard has summoned several inexorables in the hopes of rediscovering the alchemical secret to cloning more of them.
Loot: Most inexorables are fatalistic and don't care about physical wealth, but might carry a one-use magical item (such as a detonation (singularity) ring) given to them by their master with a specific purpose.
GM Intrusion: The inexorable's defensive reaction causes a character's weapon to fly from their hands, landing a short distance away.