Necessary Killing (S01E20)

S01E01 The Journey's End S01E02 It Didn't Have to Be Magic... S01E03 Killing Magic S01E04 The Land Where Souls Rest S01E05 Phantoms of the Dead S01E06 The Hero of the Village S01E07 Like a Fairy Tale S01E08 Frieren the Slayer S01E09 Aura the Guillotine S01E10 A Powerful Mage S01E11 Winter in the Northern Lands S01E12 A Real Hero S01E13 Aversion to One's Own Kind S01E14 Privilege of the Young S01E15 Smells Like Trouble S01E16 Long-Lived Friends S01E17 Take Care S01E18 First-Class Mage Exam S01E19 Well-Laid Plans S01E20 Necessary Killing S01E21 The World of Magic S01E22 Future Enemies S01E23 Conquering the Labyrinth S01E24 Perfect Replicas S01E25 A Fatal Vulnerability S01E26 The Height of Magic S01E27 An Era of Humans S01E28 It Would Be Embarrassing When We Met Again