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The Ultimate Weapon Reborn (よみがえった究極兵器, Yomigaetta Kyūkyoku Heiki) is episode 219 of the original Naruto anime.

Synopsis

Although his comrades are defeated, Hōki puts his final plan in motion by using Gaara to revive the "ultimate weapon" of Takumi Village, Seimei. To do this, he traps Gaara in a metal sphere that starts draining his chakra. Gaara partially transforms into the One-Tailed Shukaku, the overflowing chakra fueling Hōki's sacrifice of his body for Seimei's revival. Taking the weapons of the Four Celestial Symbols Men and wearing it as a spectral armour, he was able to drive Naruto to a corner despite Matsuri's attempted assistance.