Adrian returned back to the main world as he has expended a lot of mana dragging all those enemies. He managed to bluff his way into dragging the enemies as he could only do this to five enemies at once when he is not buffed. Thanks to the buff given by the Seven Original Sins, he was able to drag more people in the Shadow Realm.
"I still have half my mana or rather it regenerated to half already." Adrian stated as he used a lot of mana transporting enemies to the Shadow Realm.
He did this to try the buffs that he has received and also to test the waters on how accurate the mana decreased from transporting enemies. Just like before, it takes at least five times the mana needed to transport allies. Adrian really needs an item that could recover mana greatly or even outright cancel the mana cost.
"At least the angels are now extremely wary." Adrian stated as he could see that the angels are no longer using the invisibility tactic to get close to the Hell Gate.