SHAPESHIFTING TECHNIQUE: With this technique Madara allocates a portion of an individual's chakra and transfers it into a living human sacrifice (a deadsoul clone) . The human sacrifice takes on the appearance and abilities of the individual, essentially becoming a physically identical copy of them. The copy can then be controlled from a distance by the original and used to fight battles in their stead.
The technique will imitate any weapons, tools or even kekkei genkai held by the original person, allowing the copy to fight with them. The power of the copy is in proportion to the volume of allocated chakra, which is decided by Madara. All of the original's techniques are also available, yet once the chakra given to the copy runs out or the copy is defeated, the sacrifice will die and technique is canceled. Afterward the copy's appearance will revert back to the original appearance of the sacrifice.
While the appearance of the copy during the Shapeshifting Technique is completely perfect, it is possible for someone who has experience fighting with the original person to detect something is amiss. Exactly what is amiss is usually not realized until the copy has been defeated.
DEADSOUL JUTSU: Using this jutsu, Madara can temporarily reanimate a corpse, creating the illusion of a living person, and maneuver it at will with chakra. This is achieved by causing the heart to beat once more. The reanimated corpse can serve as either a short-time ally or an effective decoy. The traces of surgery can also be erased with chakra, because of which there's no difference, at first glance, with a live person. Kabuto adds plastic surgery to this, altering the corpse's face, and goes even further by erasing its bodily odor, so that the smell doesn't give him away, thus creating an effective body double for himself. LEARNED BY SHADOW UCHIHA[u][i]