
i have spoilers if yall if you want them!

SPOILERRRRS
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(this is probably not 100% right but) you guys remember how the doctor said that gyeong joon has a very strong soul right? they put things into action and uses GJ's soul to remove the weapon. GJ's soul goes into a different realm of some sort, where cain should be and well... WELL lets just say a couple chapters ahead is SPICY, but all in all Cain is saved, he can maintain his demon form, and the weapon gets removed
Cain took the phrase "third leg" too seriously