Aura of Vicious Intent

You may exude an extremely unsettling presence toward your enemies. Whether it's a certain sheen in your eyes or a grim look on your face, it means pain and death to your enemies. 

Gain +1 to str or con, to a max of 20

As long as the creature with this feat is not incapacitated, hostile creatures within 10 feet of it gain vulnerability to slashing damage unless they have immunity to such damage. If a hostile creature affected by this feat has resistance, they will take normal damage instead of either resistance or vulnerability.

This aura lasts for 1 minute. You may use this feat a number of times equal to your Prof. Bonus per long rest.