Simulacrum creates an illusory duplicate of any creature. The duplicate creature is partially real and formed from ice or snow. The duplicate appears to be exactly the same as the original, but there are differences: The simulacrum has only 51% to 60% (50%+1d10%) of the hit points, knowledge (including level, skills, and speech), and personality of the real creature. Creatures familiar with the original might detect the ruse with a successful Spot check. The character must make a Disguise check when the character casts the spell to determine how good the likeness is.

At all times the simulacrum remains under the character's absolute command. No special telepathic link exists, so command must be exercised in some other manner. The simulacrum has no ability to become more powerful. It cannot increase its level or abilities. If destroyed, it reverts to snow and melts instantly into nothingness. A complex process requiring at least 1 day, 100 gp per hit point, and a fully equipped magical laboratory can repair damage to the simulacrum.