'Come on goblin? Let's see what you've got.' Dustin said in his mind, while keeping his eyes fixated on the goblin before him.
Both parties participated in a brief stare down contest before deciding it was enough, as the goblin raised the staff it wielded on its left hand up while chanting some words. As it did this, red smoke appeared from the staff and covered the ground before it completely filling the whole space. Dustin just kept his eyes on the goblin observing what it was doing without interfering.
This goblin was just an E+ rank at best, so there was nothing to fear from it. If he ever felt too threatened, he could just use his taming skill to stop whatever it was doing, then killing from that point on would be useless. As long as he had the taming skill and and his opponents were beasts and monsters below the A rank, killing them would be as easy as anything.