Clockwork Mender Swarm (CR 3)
Tiny Construct (Extraplanar, Lawful, and Swarm) Alignment: Always lawful neutral Initiative: +4(Dex); Senses: darkvision 60 ft., low-light vision, Listen +3, and Spot +3 Languages: Abyssal, Celestial, Infernal (can't speak) AC: 18 (+2 size, +4 Dex, +2 natural), touch 16, flat-footed 14 Hit Dice: 4d10 (22 hp) Fort +1, Ref +5, Will +2 Speed: 10 ft. and Fly 30 ft. (perfect) Space: 10ft.; Reach 0 ft. Base Attack +3; Grapple - Attack: Melee: swarm (1d6 plus poison and distraction) Special Attacks/Actions: swarm repair, swarm sacrifice Attack Options: aligned strike (lawful), distraction, poison (DC 14, 2d4 Dex/2d4 Dex) Abilities: Str 3, Dex 19, Con -, Int 4, Wis 12, Cha 10 Special Abilities: Immune: construct immunities, swarm immunities; Resist: half damage from slashing and piercing; Weakness: swarm vulnerabilities Special Qualities: construct traits, swarm traits Feats: Alertness, Skill Focus (Craft), Skills: Craft (any one) +7, Listen +3, and Spot +3 Advancement: Climate/Terrain: Usually the Clockwork Nirvana of Mechanus Organization: Swarm Treasure/Possessions:
Source: Monster Manual IV
Poison (Ex): The save DC includes a +2 racial bonus.
Distraction (Ex): Fortitude DC 12, nauseated 1 round. The save DC is Constitution-based.
Swarm Repair (Su): A clockwork mender swarm can choose not to damage a construct with its swarm attack. When the clockwork mender swarm occupies a construct's space at the end of the swarm's turn, it can repair of 1 point of damage on that construct. The swarm can use its swarm repair on itself if it does not move for 1 round.
Swarm Sacrifice (Ex): A clockwork mender swarm can choose not to damage a construct with its swarm attack. When the swarm occupies a construct's space at the end of the swarm's turn, it can repair damage to that construct, up to the swarm's current hit points. The swarm loses an equal number of hit points as its members sacrifice themselves to become building material to repair the construct. If the swarm sacrifice reduces the clockwork mender swarm's hit points to 0, it breaks up.
Clockwork menders live on the Clockwork Nirvana of Mechanus, where they serve a vital role in that plane's ecology. Wizards and sorcerers of the Material Plane who craft constructs find them to be useful familiars and guardians for their creations.