Nanatsu no Taizai: Mokushiroku no Yonkishi Episode 21 English Subbed Episode Title: The Four Knights vs. the Servants of Chaos Episode Description: Melascula and Galland begin killing Liones's Holy Knights and non-human residents before the Four Knights arrive to battle them. Galland targets Gawain after sensing her magic's resemblance to that of Escanor, his adversary from the Seven Deadly Sins, which reminds him of his forgotten past as a demon, activating a spell Arthur placed on him that drives him insane. Gawain slices through Galland's indestructible body by teleporting her sword into him, allowing Percival to destroy him from the inside with an explosive Mini-Percival. Meanwhile, Lancelot interrogates Melascula over her and Galland's comrade, whom he confirms as the star visor knight. Melascula falls under Arthur's spell and is forced into her true form as a giant snake, but is defeated by Tristan's demonic powers, leaving a Chaos Staff behind.