Ultraman Zero: The Chronicle: Series
Ultraman Zero: The Chronicle: S1 E6 - Ultraman Zero The Revenge Of Belial - Chapter Of Mirrors
S1 E6:
Everyone comes to the Planet of Mirrors which is said to be where the Shield of Baradhi is hidden. At the bottom of a lake, the Mirror Knight, invaded by the darkness of Belial, has sealed himself away. Ran once again transforms into Zero, and rescues the Mirror Knight who has turned into a dark warrior.