Original sentence: Keita's arm is injured during another fight between Kuro and another Tera Guardian, but Kuro is able to save his life by exchanging his arm for hers since she has enhanced healing abilities like all Mototsumitamas
Edited sentence: Keita's arm is injured during another fight between Kuro and another Tera Guardian, but Kuro is able to save his life by exchanging his heart for hers since she has enhanced healing abilities like all Mototsumitamas