Blade's regeneration limits
It says when under 70% health, blade will comsume his energy to regen. I found that he can't regen back to 70% health. Every time his health gets lower and lower, eventually he dies. For instance, he's at 7000 health (assuming 7500 is his 70% health line), I got hit at this point, health went down to 6500, I hold block, and he regents back to 7000. But not anymore, not back to 7500 as I thought he would.
I hope this is not another trick Kabam uses to mislead players, by leaving important information out in his description and later claims that it's supposed to be this way.