Base Damage: Levels 1-5 = 1d4, 6-10 = 1d6, 11-15 = 1d8, 16-20 = 1d12 (Add Prof Bonus + Strength Mod for hit roll and damage.)
Denting Blows: After 3 sequential successful hits, you may choose to reduce enemy AC by -3, OR add to your AC by +3. (Passive, activated a number of times = half of Fighter level rounded down)
Cease and Desist: Before making an attack, you may choose to activate this ability. On hit, enemy is knocked back 15ft. If enemy hits wall/object, they must make a constitution saving throw (DC 8+Str Mod+Prof Bonus) or be stunned. No effect on successful save. (Uses = Half Fighter Level rounded down)
Relentless Force: Once per Long Rest, you may spend 50% of max charges to perform a mighty blow. When activated with an action, your attack adds a damage die to the roll, and your attack automatically crits.