Re: Getting Stronger and Tougher the More I Get Hurt
How about ... (just to pull random numbers) ...
+10 STR, +5PD/ED Armor (or Resistant Protection, whatever), only at 1/4 Stun or Below (-1/4)
+10 STR, +5PD/ED Armor (or Resistant Protection), only at 1/2 Stun or below (-1/2)
+10 STR, +5PD/ED Armor (or Resistant Protection), only at 3/4 Stun or below (-3/4)
Take No Figured Characteristics if you're playing 5e, so the math doesn't boing if you wind up near a breakpoint ('I'm below 1/4, get more STR, now I'm above 1/4, lose the STR, now I'm below 1/4 ...'), and voila. The more hurt you get, the stronger and tougher you get.