Radiant Marmu Double Challenge - No Movement (1st Kill) and Nail Arts Only (2nd Kill)
Two short Marmu challenges rolled into one video. First is a challenge to kill a boss without moving at all and Marmu is chosen for the pinball boss. Second is a challenge suggested by Mr. Koth to defeat Marmu using nail arts only (in this case, Great Slash). It was suggested by another to kill Marmu with just dash slash after finishing this, so likely will hold off on that for the time being.
No moving isn't that bad, although really unlucky Marmu movement can doom you (however in this attempt Marmu's aim is really bad). Nail Arts only isn't too bad, but since you attack less frequently you have to dodge Marmu a lot more.
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CrankyTemplar presently has 30,354,177 views for Hollow Knight across 568 videos, and roughly 19 days worth of Hollow Knight videos were uploaded to his channel. This is 19.92% of the total watchable video on CrankyTemplar's YouTube channel.