'Intentions are like special forms of magic.'
Eren thought to himself as he observed Darven and Harja Mel. They still had their personalities for the most part. However, they had become extremely loyal to their new master ever since they became a special existence.
Eren started understanding the nuances of Sin Series mana and the various Abilities it is associated with. It was clear to him that the creator of the Sin Series Mark had created profound magic with the simplest intentions of all times.
Sloth, greed, lust, gluttony, and other similar intentions are usually normal human emotions taken to extremes. One could say that it was their overindulgence that made them sinful. And yet, such simple concepts could be used to derive logic-defying Abilities the likes of which most rankers in Anfang couldn't even begin to comprehend.