S1·E5 Alviss, The Mysterious Young Man!

Alviss’ arrival brings a dark secret to light: the existence of a rebellious military faction known as the Chess Pieces army, which 6 years ago came within an ace of conquering MÄR-Heaven before it was quelled by the world's guardians, the Cross Guard soldiers; and the need to dispose of Babbo due to its gory history of massacring people alongside the Chess un-dead commander, Phantom. Much persuasion, and even retaliation (though vain) is needed from Ginta to change Alviss' mind, including a promise to get stronger. Meanwhile, in a lightning-zapped graveyard, one bevy of masked warriors salutes a man, seemingly resurrected from inside his tomb, whom they addresses as 'no.1 Knight Phantom'.