@Shakur first statement is false (EDIT: without giving any spoiler, Igris was raised a bit over 4h after he was defeated on ch45). Second is correct, its for diseases/illness, not for injuries. Third is false, he toyed with Beru on the novel, one upping him just like on the manhwa on the past chapters. Correct, his job was literally 'Necromancer' (chapter 45 starts by showing this), the hidden version he got is 'Shadow Monarch'.
@MangoCo his shadow soldiers are recovered using his mana as soon as they are defeated, its not like they even would need a healer.
@Sep10trion what do you mean? Iron is also a shadow soldier from a hunter.