"Getting A New Enslaved Soul" 

The man noticed Jake's small movements, but out of trust in a fellow 'prisoner', the man quickly accepted whatever Jake gave him. 

When Jake spoke some vague words to the man, the man nodded even when he didn't really hear anything clear. This way, he subconsciously accepted whatever Jake did to him. 

Once the man accepted the deal token and expressed his agreement with whatever Jake said or whatever Jake was doing, Jake's trader ability was instantly activated. 

Jake could see a system panel suddenly appearing in front of his eyes, and the trade content appeared on this panel. 

Jake had not decided on the details of the trade, but since he wanted to help the man quite a bit, he immediately made the trade directly to a soul trade. 

The man would give his soul to Jake so that Jake could mark the soul as his possession. This means, the man's life was in Jake's hands, and he indirectly became the slave of this black-hearted capitalist.