Skill Check: Knowledge (arcane lore) DC 39, 6 successes (and see text) and Disguise DC 39, 1 success; Failure: Two consecutive failed skill checks; Components: V, S, M (see text), XP; Casting Time: 7 hours (minimum); Range: Touch; Effect: One duplicate creature; Duration: 12 days; Saving Throw: None; Spell Resistance: No
The body double incantation creates a duplicate of any creature formed from mystic clay, with alchemical blood and an eldritch life of its own. At first glance, the duplicate appears to be exactly the same as the creature you modeled it after, but there are differences: The body double has only half the level or Hit Dice (which affects its skills, feats, and class features). It has the surface mannerisms and personality of the real creature, but its Intelligence, Wisdom, and Charisma scores are all 5. Creatures familiar with the original might detect the ruse with a successful Spot check. You must make a Disguise check when you cast the incantation to determine how good the likeness is, and this Disguise check sets the DC for Spot checks (to notice imperfections in the duplication) and Sense Motive checks (to discern that the body double is behaving oddly).
At all times the body double remains under your absolute command. No special telepathic link exists, so command must be exercised in some other manner. The body double has no ability to become more powerful. It cannot earn experience points. If destroyed, it reverts to clay and melts into a vaguely humanoid lump within 1 minute. The body double doesn’t naturally heal and responds to neither conventional medicine nor natural healing. A complex process requiring at least one day, materials (purchase DC 5 + 1 per hit point), and a fully equipped magical laboratory can repair damage to the body double.
Material Component: The spell is cast over an elaborate clay simulacrum of the creature to be duplicated, and some piece of the creature (a hair or fingernail, for instance) must be placed within the clay. Additionally, the incantation requires rare earths and unguents (purchase DC 30).
XP Cost: 1,000 XP.
Failure: Betrayal. The body double has allegiances opposite the original creature and a pathological hatred of both the original creature and the caster. Furthermore, the body double isn’t under the command of the caster, although it may play along for a while while it learns about its new enemies.