Odin was nothing if not a bit of a showman, having worked in his bar and entertained the worst scum in Oak for many years. He knew how to choose his moments, and when best to strike. That ability came in handy here, as picking the right time to provoke the Rune Knights was crucial into seeing what the response was. Nighttime was the obvious answer, with knights wanting to get sleep and already being irritable. Here he would see the response: if the knights would attack him from knowing who he was, or if they would just ask him to leave.
Sure enough, a young man came out and began shouting at Odin, in a voice equally loud to make sure the Lich could hear. Oh, the higher ranking members likely wouldn't be huge fans of all this shouting. Odin was asked, politely but threatening -if such a tone of voice could exist-, to leave the headquarters and, for lack of a better term, shut up. Apparently this man was allowed to use force on the Lich too, in case Odin resisted.
The boy was young, too young to be anything other than the lowest rank in the knights -unless he was someone kind of prodigy-, so Odin knew that he'd be able to have a little fun with this. "And what if I say no?" the Lich asked, still shouting over to the man to get everyone in the area annoyed. Odin, while speaking, raised one arm to wave at the man, and that's when he felt it. His arms felt heavier, noticeably but not by a lot. He rolled back his shoulders, and felt his body for a second. Something had caused his physical abilities to drop a little. He could still punch as hard, run as fast, and last as long, but he could feel the minute changes as he stood there.
"Oh, you really shouldn't have done that..." he whispered, activating Fear. A wave of dark energy would emanate from Odin causing any in the vicinity, for example the rune knight, to feel the crushing weight of the Lich's bloodlust. This would prove, beyond all doubt, that Odin wasn't just a run-of-the-mill mage, but an evil to be feared.
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