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Cobra, Iron

This creature resembles a small, metallic cobra. Its body is made of overlapping iron plates, and its eyes are pinpoints of red light.
Iron Cobra
 CR 2
XP 600
N Small construct
Init +2; Senses darkvision 60 ft., low-light vision; Perception +0
DEFENSE
AC 20, touch 13, flat-footed 18 (+2 Dex, +7 natural, +1 size)
hp 15 (1d10+10)
Fort +0, Ref +2, Will +0
DR 5/—; Immune construct traits; SR 13
OFFENSE
Speed 40 ft.
Melee bite +3 (1d6+1 plus poison)
STATISTICS
Str 12, Dex 15, Con —, Int —, Wis 11, Cha 1
Base Atk +1; CMB +1; CMD 13 (can't be tripped)
Skills Stealth +12; Racial Modifiers +6 Stealth
SQ find target
SPECIAL ABILITIES

Find Target (Su)

Once per day, an iron cobra's creator can order it to find and kill a specific creature within 1 mile, which it does as if guided by discern location. The creator must have seen or be holding an item from the specified creature for this order to function.

Poison (Ex)

An iron cobra's bite injects poison from a hidden reservoir within its body. Because it is a construct, the cobra does not naturally produce this poison, and its creator must refill this reservoir manually. The reservoir holds enough poison for 3 successful bite attacks, after which the creature merely deals bite damage. Refilling the reservoir takes 5 rounds and provokes attacks of opportunity. The creator can fill the reservoir with any injury poison (typically black adder venom), though acid, alchemical substances, and even stranger liquids have been used.Black Adder Venom: Bite—injury; save Fort DC 11; frequency 1/round for 6 rounds; effect 1d2 Con damage; cure 1 save.
Construction

An iron cobra's body is built from 100 pounds of magically treated materials (typically iron).

Iron Cobra

CL 7th; Price 4,000 gp (iron); 20,000 gp (adamantine), 8,000 gp (cold iron), 5,000 (darkwood), or 10,000 gp (mithral)

 CONSTRUCTION

Requirements Craft Construct, animate object, discern location, geas/quest; Skill Craft (armor), Craft (blacksmithing), Craft (carpentry [for darkwood cobras only]), or Craft (weapons) DC 15; Cost 2,000 gp (iron); 10,000 gp (adamantine); 4,000 gp (cold iron); 2,500 gp (darkwood); 5,000 gp (mithral)

Variants

Iron is the most common material for these creations, but some crafters prefer more exotic materials when creating the serpentine constructs.
Adamantine Cobra (+1 CR): This cobra is more solidly built than others. Its natural armor bonus increases to +12, it gains +5 hp per HD, and it gains DR 10/—.
Cold Iron Cobra (+0 CR): This cobra’s natural attacks count as cold iron for the purpose of bypassing damage reduction.
Darkwood Cobra (+0 CR): This cobra is more mobile; it gains a swim speed of 30 ft. and a climb speed of 20 ft.
Mithral Cobra (+1 CR): This cobra is much swifter. Its Dexterity increases by +4 and its speed to 70 ft., and it can make 2 bite attacks per round as a full attack action.
ECOLOGY
Environment any
Organization solitary, pair, or nest (3–10)
Treasure none

The iron cobra is a simple construct that resembles a hooded cobra made out of metal. The iron cobra is typically used as a bodyguard or guardian of treasure, though its magical ability to unerringly locate creatures means it is also used as an assassin. Since an iron cobra's poison reservoir can contain multiple types of venom, the construct's specific use can be further tailored by varying the poison used. Some spellcasters even fill these reservoirs with potions, so that when the cobra bites, it injects the potion into its target. This is a somewhat dangerous method for gaining the effects of a potion, but it does free up the cobra's master to do other things in a combat round apart from quaffing potions.