While Ryan made the dungeon see the moment he caused that explosion several times, Soul Eater drained all of its mana. A dungeon master of that level would notice it was weird sooner or later. That is why Ryan made sure to make the creature experience those seconds, and then Ryan replicated the memory before deleting it. It was a pretty nasty way to defeat an enemy, but Ryan would do anything to reach his goals.
"I wished that I had thought of this sooner… by teleporting to far away, no one would be able to find us fast enough, thus I wouldn't have to hold back anymore," Ryan said. "Oh, well… liv and learn."
