2nd degree Arcane Knight Bonus Action (Stance)
As part of this stance, you trace a rune onto a melee weapon. Your mark is transferred to the next creature you successfully hit with the inscribed weapon. If the marked creature attempts to attack any other target but you, it takes force damage equal to your Intelligence modifier, regardless of whether the attack hits. This stance ends early if you wish to mark another creature or if the target is more than 30 feet away from you.