Watch Hunter X Hunter - 139 Here

: To secure his sister's freedom and save Gon, Killua uses his mother’s life as a wager to force Silva to let him leave the family estate with Alluka (1.1.2, 1.2.1).

: This episode highlights their clashing views; Killua treats Alluka as a sister he loves, while Illumi and the rest of the Zoldycks view her as a "thing" or a dangerous monster ( 1.2.2 , 1.5.3). Watch Hunter X Hunter - 139

: They form a temporary alliance as Illumi asks Hisoka for help managing the situation, fearing that a misused wish could lead to the death of the entire family—and potentially Hisoka as well (1.1.2, 1.5.5). If you'd like, I can: : To secure his sister's freedom and save