Levels of health

This idea is nor really original, but got inspiration from the storytelling system. 

In D&D works like levels of exaustion, but both are stacked in the same pool, the difference is the speed of recovery.

• Bruised. No penalties are issued.
• Hurt. You can't used adventage in Str checks but no movement penalties.
• Injured. You can't used adventage in Str checks and movement is slightly impared.(-1/4 or -25% or mins one feet)
• Wounded. Disvantage for Str checks and movement is limited to walking and jogging (running minus two feet).
• Mauled. Disadvantage on attack rolls and saving throws
• Crippled. Speed reduced to 0 (but with Str check, and one feet)
• Incapacitated. A character may take no actions or move due to unconsciousness.

There are three levels beyond incapacited. It would be like the three death save checks. 

This could replace the infamous level-draining powers by some powerful undead monsters. helping for a faster calculating of the stats.