Planar Bestiary
An agonizer works alone, with others of their kind, or in subservience to some other creature, as their master desires.
An agonizer is a floating, nearly spherical eyeball about 3 feet in diameter, with one large iris and several smaller ones scattered over their surface. A three-fingered claw dangles from their underside. They are a fiend created to spy on, watch over, or torture other creatures.
No one knows if agonizers were bred independently by demons, devils, yugoloths, and other fiends, or if one kind of fiend spawned them and the others copied the original. Regardless, they can be found on all the Lower Planes, in service to various evil masters.
An agonizer memorizes everything they see, allowing them to perfectly recall a confession under torture and any conversation they witness. Their master can order them to erase some or all their memory at any time, which prevents what they know from falling into the wrong hands.
Motive: Serve other fiends, record confessions
Environment: The Lower Planes, anywhere fiends operate
Health: 12
Damage Inflicted: Moderate wound (4 points)
Armor: 1
Movement: Short when flying
Modifications: Resists magical mental influence as level 10; resists mundane trickery as level 2
Combat: An agonizer targets a creature within immediate range with a mental assault, inflicting Intellect damage (ignores Armor) on a failed Intellect defense task. A victim that takes damage must succeed on a second Intellect defense task, or lose their ability to act for one minute or until they succeed on an Intellect defense task on a subsequent round to end the effect early.
The agonizer can reduce themself to the size of a regular human eyeball as their action. While so tiny, they attempt stealth tasks as level 6, but their attacks, including the one indicated hereafter, inflict only 1 point of Intellect damage (ignores Armor). They can return to their normal size as part of another action.
When the agonizer dies, they explode in a painful burst of mental energy, and each creature within immediate range that fails an Intellect defense task takes 4 points of Intellect damage (ignores Armor), or just 1 point of Intellect damage (ignores Armor) with a successful defense task.
Interaction: Although agonizers are intelligent, they are barely sentient and (much like golems) lack emotional depth. They understand fiendish languages like Abyssal and Infernal but can't speak audibly. However, they can use telepathy within short range to get across basic concepts.
An agonizer's response to pain or pleasure (their own or another's) is muted; they don't react to torture or even mortal threats with anything other than mild annoyance. They can experience pain, but the sensation is more akin to a slight itch than anything else. They have no ambition or desires. These qualities make them excellent guards and torturers, for they can't be bribed or coerced, nor do they understand mercy.
Use: The PCs find a victim being tortured, attended by one or more agonizers. The agonizer could be hidden in the empty eye-socket of the one of the torturers if at their tiny size.
Loot: Some agonizers carry a single bead of perfect memory.
GM Intrusion: The agonizer produces a magically animate torturer (level 3; flies a long distance each round) that attempts to attach itself to a foe to deal pain and damage each round.