Xu Tu, an agricultural university student, is caught in a cow-related accident while working in the fields and transmigrates to the Warring States period in Naruto, where he unexpectedly inherits the Monster Sanctuary System. A devoted fan of monster movies like Godzilla and Pacific Rim, he uses the System to design and summon monsters, and can even upgrade the sanctuary's summoning abilities. Thus begins his path to turning the tables in the Naruto world.
When he first arrives in the Warring States period, he summons monsters like Earth Release: Armored Mole Cricket and Wind Release: Crying Feather, making a name for himself amid the chaos and establishing the Monster Sanctuary's reputation through overwhelming strength. From the founding of the ninja villages through the Third Shinobi World War, he creates powerful monsters like the Armored Subaqueous Dragon and the Giant Wind Scorpion, takes on the Tailed Beasts, and turns the tide of battle, gradually bringing the sanctuary level with the Three Great Sage Lands. In the era of Naruto Shippuden, he introduces the Magnetic-Breaking Beast to counter the Akatsuki and the Holy Light Butterfly to dismantle the Impure World Reincarnation army. He then uses the ultimate Hongmeng Beast to help Naruto and Sasuke seal Kaguya. During Boruto: Naruto Next Generations, he summons the Dimension-Devouring Beast to destroy Kara's alternate dimension and the Karma-Countering Beast to fight the Otsutsuki. At last, he protects the Shinobi World with the world-creation-level Cosmic Titan, becoming a legend known as the “Sage of the Monster Sanctuary.”
