Malicious Mark

As a bonus action, you can mark a creature within 15 feet with a sigil. Alternatively, you may activate this stance by expending your reaction after dealing weapon damage, marking the creature you damaged. While a target is marked in this way, any attempt to use the Help action against that target is a bonus action, rather than an action. This stance ends early if you wish to mark another creature or if the target is more than 30 feet away from you.