Luke used that moment of surprise to start his counterattack. He couldn't blame his opponents for getting surprised since he used Space magic and then moved one of his concentrated health potions to inside his mouth. From their perspective, he just began to heal without using magic. Still, it was quite unpleasant to chew the glass of the potions. Fortunately, his body was strong enough to deal with that. He had to think of a better way to do that, though. It was quite unsightly to see him using the potion like that.