Episode 12
Shoshidai's new weapons are no match against the demonic powers of Zsoltgewinn, pitting Ichijo and Gai against Miura in a fierce battle.
Aired 23/03/2018EP 12 - Episode 12

2018
SWORDGAI The Animation
The story revolves around Gai, who was born beside a woman who met her death in a forest. He was adopted by the swordsmith Amon. A few years later, Gai becomes Amon's apprentice, and during the forging of a sword, he loses his right arm. To help him, Amon crushes the demon sword Shiryuu (lit. Death Dragon) to form it into Gai's replacement right arm. Gai then is able to fuse with the weapon on his arm, and fights against his enemies.
(Source: Anime News Network)