Therein I found a strange monster called the Necroton. The description states:
The creature is golem-like and designed to go forth and find treasure for its greedy wizard master.A greedy wizard is said to have designed the first Necroton. Therecan be no doubt that this is the case, for the appearance of the metalbodiedNecroton is convincing proof of its artificial origin. At firstglance this creature appears to be some sort of giant crab. Its large,oval-shaped metallic body and multiple sets of legs give this impression,as do its two forepincers. However, its luminous central eyemarks it as something quite more than this.
What makes the creature notable to me isn't its purpose, its picture or its stat block. What I like most is the way the article reveals the creature to the reader. The creator of the Necroton, a Mr. Phil Meyers, was very thoughtful in its genesis.
First, he reveals the purpose of the creature (steal stuff). Then he explains how one would go about making a Necroton should one be so inclined. He lists the spells (Wish, Polymorph Any Object, Wizard Eye, Geas, Hold Monster, Fireball, and Detect Magic) that are required to create the beast.
I like how each spell has a connection to the powers of the creature. The creature can cast fireballs, so Fireball is used in its creation. The creature goes out and performs a mission, so you cast Geas. It can detect magic with its central eye; Detect Magic, Wizard Eye. Paralysis Ray = Hold Monster.
Then there's a neat part that explains how to use the Message spell and a Crystal Ball to basically control the Necroton "remotely".
Finally, toward the end of the article, the author describes strategies the Necroton might use when it encounters it's "prey" -- in this case the heroes.
All in all a very thoughtful and complete treatment of an unusual monster. This kind of detail goes a long way when deciding if the creature has a place in your game.