Black Prior

Once originally members of the knights of Balor, the first of the Black Priors were corrupted due to varying reasons (From betrayel, greed, ego, ect ect) and rescinded their holy vow. They became a mercenary company serving under the highest bidder for battles or training troops. Black Priors Dedicated to the dark route can be seen best by their dark outfitting and their use of hoods mimicking the appearance of a reaper. There exist those not fully dedicated, and have returned to society to train others who wish to learn the combat style of the company (though they are typically rejected by many Prior groups if they try to return). So while not every user of the style is a Black Prior themselves, their training can always be linked to a member of the fallen order.

impetum contra impetus

Upon joining in the Black Priors training if your opponent rolls a 5 or lower you can use your reaction to flip an opponent with a roll requirement of DC12 or above, take 1 damage if failed. If they roll above five but not hit you can attempt to flip with a roll requirement of  DC16 or above, take 3 damage if failed. If they would normally land a hit you could attempt to flip with a role requirement of DC19 or above, on a failed flip add 1D8 to the opponents damage. On any successful counter roll a 1D8+fighter level damage. The damage improves to 2D8+fighter level damage at level 10 and 3D8+fighter level damage at 18

id munimentum contra

Use an action to hold your counter, any opponents that attack will be countered, instead of the first one on reaction.

Ender et iuramentorum praevaricationem

Target one creature's defensive weakness to be called out to the party. The opponent must make a CON saving throw equal to 10+your CON modifier. Until the end of your third turn the opponent has a -5 to their AC. This  increases to -10 at level 18

 

You can only use this ability once per long rest

sanitatem impetum

At fifteenth level you gain temporary hitpoints up to half the damage + CON modifier done on a Bulwark counter. You cannot gain less than one temporary hit point

Dura Requiem Tabernam

Upon successful Bulwark counter you can use this ability to invigorate your allies within 25 feet and unnerve opponents up to 30 feet away. Until the end of your next turn allies have advantage on attacks and opponents have disadvantage on attacks. You can use this ability equal to 1+CON modifier before you need to complete a long rest to recharge your ability. You cannot have less than one charge if your CON modifier is in the negatives