Haki, conqueror's

you have developed your strength in ways beyond the physical, so much so that your very presence is enough to bring your weaker foes fall to their knees. once per long rest, you may impose your will to attempt to knock your enemies unconscious. to do so, roll 1d10+ your charisma modifier (this increases to 2d10 at level 10, 3d10 at 15, and 4d10 at level 20). every creature within a specific radius (5ft x your current level) that has HP less then you d10 roll, are immediately knocked unconscious. (creatures with HP above the roll are unaffected.)