Iron Cobra

The iron cobra is a tenacious construct capable of tracking down its victims over nearly every terrain. An iron cobra is typically 3 feet long and weighs about 100 pounds. It looks like a cobra made out of dozens circular iron bands, fitted together to form a snakelike body. It is rumored that the first eight iron cobras, created ages ago by a powerful cleric/wizard, were nearly indestructible. Since that time, other spellcasters have taken to copying the design, but with universally poorer results. Even those lesser version can only be effectively harmed by adamantine weapons.

An iron cobra has no intelligence of its own, but it can be commanded to undertake any number of actions by its creator. If its creator is not present, the cobra can undertake simple commands (such as "Guard this treasure" or "Seek out and attack the king"); it follows these commands to the letter. In combat, a cobra's tactics are straightforward - bite until its victim dies. It is also resistant to magic.