Koshiro can reanimate a massive number of corpses at once, as long as they are within his presence. Mass Dead Soul technique works similar to it's parent Jutsu which brings back to life a lesser number of corpses. Koshiro will only use Mass Dead Soul technique in dire situations as it requires too much Chakra to manipulate for a long period of time. However, he has used this technique to spawn his very own army, lead by his strongest corpse brought back using his heart. His corpses contain mixed limbs, each reattached with his Earth Grudge Fear threads.
