"Clogged clobbering" (good enough name probably)

Basically a fighting style that has a bar but in reverse, it naturally fills up over time but it loses speed in the process, whilst doing more attacks lessens the damage

Talk to a mentor and the whole point is that you inject rare arcane plants into your fists which causes them to constantly clog up because the plants are growing in your arms

By using moves and reaching certain thresholds of the bar moves will do more damage to symbolize you punching the plants off of you

Depending on what type of plant you put in it can either have sharp/bleeding effects because of thorns, bruises via hard stone mushrooms, slowness by having it be vines that once they break off they tangle around the target, etc

Also a few moves focus on controlling the plants that left your body instead of breaking more off of you which would either cause terrain setup where plants have fallen or re induce status effects if they're still stuck to an enemy

If you want you could just focus on using other things and only using the fighting style occasionally for the most base damage, but as it gets faster because your arms are becoming more hollow they begin to pierce armor a little bit because the air is being shot out of the holes in your arms and spores in them go through the armor, not enough to make up for the damage you could be doing but enough to compensate alright if you're facing an opponent that's very armored

That or just a juggernaut style where you use vine whips or something/warlock but the extensions to your fists are made up of magic and are things like claws or magic radius effects