Fate/Grand Order Absolute Demonic Front: Babylonia
Season 1, Episode 20: Absolute Demonic Front Mesopotamia II
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Tiamat falls into the underworld, but there, she transforms into one of the Evils of Humanity: Beast II. Hassan-i Sabbah, the first Old Man of the Mountain, intervenes, using his power as Grand Assassin to deprive Beast II of her immortality.
All Episodes - Season 1
Episode 1
Absolute Demonic Front: Babylonia
Episode 2
Fortress City: Uruk
Episode 3
The King and His People
Episode 4
Welcome to the Jungle
Episode 5
Gilgamesh's Journey
Episode 6
The Tablet of Destinies
Episode 7
Diversionary Operation
Episode 8
The Mother of Demonic Beasts
Episode 9
Good Morning, Goddess of Venus
Episode 10
Hello, Goddess of the Sun
Episode 11
Temple of the Sun
Episode 12
Death of the King
Episode 13
Goodbye, Goddess of the Underworld
Episode 14
Decisive Battle
Episode 15
The New Humanity
Episode 16
Awakening
Episode 17
The Congress Dances
Episode 18
Star of the Beginning, We Look Up at the Sky
Episode 19
Absolute Demonic Front Mesopotamia I
Episode 20
Absolute Demonic Front Mesopotamia II
Episode 21
Grand Order
Episode 22
Initium Iter