>>283246510
Hyakka is described as weak against 水属性の陰陽術 (Mizu zokusei no onmyō-jutsu) or "Water-Element Onmyoujutsu" rather than "these creatures and spells". He says "くそっ" (kuso o) in response, or "damn it" or "shit". As for Mao, I don't know if VIZ is implying he's referencing something regarding Nanoka's personality, but in the original Japanese, he just says she's of 土属性 (Tsuchi zokusei) or "earth attribute". Nanoka's response seems less hostile in Japanese, but we see her expression, so that might be just due to me not knowing the nuances of the language.