Spider

are a species of spiders that have so-far been used exclusivly by the spider-user ninja, Kidomaru of the Sound Four. The 'Ninja-Spiders' use in battle can be considered a form of Ninja Tool in combat. The ninja-spider's purpose in battle is to converge on their victim's location, ensnaring their victims in spiderwebs, cutting off the victim's exits and restricting their movements... until the victim is completely incased in a cocoon just like their prey.

Much like the Ninhachi used by the Kamizuru clan, these 'Ninja-Spiders' are summoned into battle by the user, (Kidomaru,) who first summons a large female with eggs to have the young, (which are roughly the size of small dogs,) swarm over his opponent, (the Rain of Spiders technique,) capture the unfortunate victim, and then let the young feed on them.