Nilbog (CR 3)

Small Humanoid
Alignment: Usually neutral evil
Initiative: +1 (Dex); Senses: darkvision 60 ft., Listen +3, and Spot +3


AC: 14 (+1 size, +1 Dex, +2 studded leather), touch 12, flat-footed 13
Hit Dice: 1d8 (4 hp)
Fort +2, Ref +1, Will +0
Speed: 30 ft.
Space: 5 ft./5 ft.
Base Attack +0; Grapple -5
Attack: Morningstar +1 melee; or javelin +3 ranged
Full Attack: Morningstar +1 melee; or javelin +3 ranged
Damage: Morningstar 1d8-1; or javelin 1d6-1
Special Attacks/Actions: Spatio-temporal reversal
Abilities: Str 8, Dex 13, Con 11, Int 10, Wis 11, Cha 8
Special Qualities: Damage reversal
Feats: Alertness
Skills: Hide +6, Listen +3, Move Silently +4, and Spot +3
Advancement: By character class
Climate/Terrain: Temperate and warm land and underground
Organization: Gang (4-9), band (10-20 plus 100% noncombatants plus 1 3rd level sergeant and 1 leader of 4th-6th level), warband (10-24 with worg mounts), or tribe (20-60 plus 1 3rd level sergeant per 20 adults, 1 or 2 lieutenants of 4th or 5th level, 1 leader of 6th-8th level, 10-24 worgs, and 2-4 dire wolves)
Treasure: Standard

Source: Converted

The nilbog is a goblin afflicted with a strange space-time reversal disease known as Nilbogism. The disease appears to occur when overly heavy use of magic strains the fabric of the space-time continuum, and leads to some very strange localized events. The disease only affects goblins and is not transmitted by them.

Combat

The nilbog, like all goblins, favors ambushes, dirty tricks, and overwhelming odds to a fair fight. It will move within range of a foe so as to affect the creature with its spatio-temporal reversal ability.

Spatio-Temporal Reversal (Ex): Creatures within 20 feet of a nilbog will generally pursue a course of action contrary to their normal intent; for example, a creature may feel an overwhelming urge to load all its treasure into an empty treasure chest and leave empty-handed. The DM must adjudge the exact circumstances and how it affects those within range. Note that creatures affected do not receive a saving throw to avoid the effects of this ability.

Damage Reversal (Ex): When struck by any attack that would deal it damage, the nilbog actually gains hit points equal to the damage inflicted. It can gain more than its maximum hit points, but never more than 2x its normal hit points.

The nilbog can only be damaged through the use of curative magic (cure light wounds, healing potions, etc.). Curative magic deals damage equal to the amount it would normally heal.

The Nilbog first appeared in the Fiend Folio (1981).