The Reanimated Allied Forces Naruto: Shippûden : Season 14 Episode 21

In a attempt to recover his most powerful pawns, Kabuto reincarnated some of his weakest dead soldiers to ambush the Shinobi Alliance. He used Torune to summon them. White Zetsu appeared in the battlefield, and he realised that those were Impure World Reincarnation's failures.