Naruto Created 1000 Clones to Train Elemental Ninjutsu

Multiple Shadow Clone Technique

This technique is a larger-scale version of the standard Shadow Clone Technique; there is no real difference between them beyond the number of shadow clones being created. Creating even a single shadow clone will require half of a user's chakra, for which reason the normal Shadow Clone Technique is generally only safe to use for jōnin. Because of how many clones are created with the Multiple Shadow Clone Technique, the chakra cost is far greater, rendering it unsafe to use for most people other than the Hokage. For this reason, the First Hokage declared it forbidden and hid it away in the Scroll of Seals. Naruto Uzumaki is among the few exceptions to this rule because of the sheer amount of chakra he has access to.