Nahui Mictlan (Fate/Grand Order) Wiki

Lostbelt No. 7: Golden Sea of Trees, Nahui Mictlān: Those Who Rule the Planet

The Foreign God has attacked the Wandering Sea. Chaldea escapes in the Storm Border, though at a great cost. Now they begin their attempt to enter the seventh Lostbelt and finally put a stop to the Foreign God's terrible machinations.
This seventh Lostbelt is situated in the Amazon rainforest of South America. A lush, fertile land brimming with trees, this place nurtured many forms of life. This place is said to be the wellspring of all life on Earth. But, with the Tree of Emptiness haven taken root, this place has become a wasteland of death, of cracked soil and parched earth, overhung with rumbling thunderheads.
Why is this once-lush land now dead? What course did this Lostbelt's history take?
In this harsh South American Lostbelt, devoid of all life, humanity readies itself to confront the only remaining threat.

The seventh and final Lostbelt story arc in Fate/Grand Order, taking place in South America and supervised by the Crypter Daybit Sem Void.

Part 1 was released on the Japanese server on December 25, 2022, and on the NA server on December 25, 2024. Part 2 was released on the Japanese server on January 31, 2023, and on the NA server on January 15, 2025.