Iron Defender( Eberron Campaign Setting, p. 287)
Hit dice: 2d10+10 (21 hp)
Speed: 50 ft.
Armor class: 17 (+1 size, +2 Dex, +4 natural), touch 13, flat-footed 15
Base Attack/Grapple: +1/−1
Attack: Bite +5 melee (1d6+3)
Full Attack: Bite +5 melee (1d6+3)
Space/Reach: 5 ft./5 ft.
Special Qualities: Construct traits, darkvision 60 ft., low-light vision
Saves: Fort +0 Ref +2 Will +0
Abilities: Str 14, Dex 15, Con —, Int 8, Wis 11, Cha 7
Feats: Weapon Focus (bite)
Challenge Rating: 1
Alignment: Any (same as creator)
Advancement: 3–6 HD (Small)
The creature resembles a dog, but its body is formed from iron plates and bars. It stands about two feet high at the shoulder. Its mouth is lined with serrated blades of steel.
An iron defender is a homunculus designed to fight for its creator. It has no special abilities beyond its combat prowess.
An iron defender is forged from iron and enlivened with a pint of the creator's blood. The materials cost 75 gp. Creating the body requires a DC 14 Craft (metalworking) check.
An iron defender with more than 2 Hit Dice can be created, but each additional Hit Die adds 2,000 gp to the cost to create.