Summary of Solo Leveling Manga Chapter 120
Su-ho faces the Itarim’s second wave and it is significantly more dangerous than the first. These are the Itarim’s Apostles — named entities with individual abilities, each one a genuine crisis-level threat. Su-ho fights the first Apostle and the battle is close enough that he takes real damage for the first time. Beru steps in to support and between the two of them they defeat the Apostle, but Su-ho recognises this is the beginning of a sustained escalation, not a series of manageable individual encounters.