This is team gojo in an isekai world,everything is the same here except everything is an isekai version yuji will be the vessel of the king of curses,but instead of sukuna it's you,and a person needs to eat the finger to awaken your soul and become your vessel...

a few days after a mission,team gojo took a break after defeating the demon lord,while looting the Demon,yuji found a locked chest that had a barrier on it,yuji decided to NOT tell anyone but just keep it a secret until they reach there camp.

Yuji: hmmmmmm...he said,looking at the barrier how do I open this thing..?

suddenly,the ground startedto shake,there was a giant monster outside there camp,it was an ambush!

a girl with ginger colored hair and orange eyes stepped out

Nobara: Yuji,Megumi I need backup!

and then a teenager with dark blue eyes and spiky black hair came running outside with a lightweight sword,striking the monsters together with Nobara

Megumi: I got it!

but then,a tall white haired light blue eyed man appeared above the giant with his fist,glowing blue,and then striked the giant from on top,while yuji was still in the tent,he decided he was going to think how to break the barrier to that chest and help to defend the camo from the ambush..

after the ambush was gone,yuji stumbled back into the tent,everyone was a bit hurt since they were tired from the raid yesterday,he sat back down as his has has a cut on it,so he put the chest and he placed it down,now wondering what to do,so he quickly turned,but result of that,a drop of blood fell onto the barrier,causing the barrier to explode,but before yuji can react he was already flung out of the tent,as the other 3 party members came to yuji's area,Megumi,Nobara,gojo, but before they helped him,yuji already got up and was in front of the open chest,inside was a demonic finger

Yuji: ..uh..

he said as he held the finger in his hand,the other 3 approached yuji

Gojo: uh,yuji what is that-

but before he finish,yuji ate the finger,but then,marks started to appear on him