That Time I Got Reincarnated as a Slime
Season 1, Episode 24: Black and the Mask
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This story takes place before Rimuru's reincarnation. Shizu, also known as the Conqueror of Flames, responds to an urgent request calling her to the Kingdom of Filtwood. When she reaches the castle, many adventurers are already there. What request could have demanded such a huge gathering? It turns out a demon has been revived, and the adventurers have been called to subjugate it. It is said that more than ten of the most skilled adventurers have already been killed by this demon. But there is more to this request than meets the eye...
All Episodes - Season 1
Episode 1
The Storm Dragon, Veldora
Episode 2
Meeting the Goblins
Episode 3
Battle at the Goblin Village
Episode 4
In the Kingdom of the Dwarves
Episode 5
Hero King, Gazel Dwargo
Episode 6
Shizu
Episode 7
Conqueror of Flames
Episode 8
Inherited Will
Episode 9
Attack of the Ogres
Episode 10
The Orc Lord
Episode 11
Gabiru is Here!
Episode 12
The Gears Spin Out of Control
Episode 13
The Great Clash
Episode 14
The One Who Devours All
Episode 15
The Jura Forest Alliance
Episode 16
Demon Lord Milim Attacks
Episode 17
The Gathering
Episode 18
Evil Creeps Closer
Episode 19
Charybdis
Episode 20
Yuuki Kagurazaka
Episode 21
Shizu-san's Students
Episode 22
Conquering the Labyrinth
Episode 23
Saved Souls
Episode 24
Black and the Mask