Debuff Idea
Crippled is applied by getting your legs badly hurt (e.g. falling, legs being slashed, etc). This makes your Sprint 75% weaker. Lasts only for a little while (10 Seconds), or 50% longer on Bloodlust Mode (15 Seconds).
Item Idea
Item: “Painkillers”
Type: Medical
Stack Limit: Start with 3, 4 Maximum
Appearance: An opaque white syringe with “Painkillers” printed on it along with a red blood droplet that’s crossed out. (Roblox Compliant / Alternate Skin) Similar to the syringe, but it is a bottle of pills instead. Usage of both variants should be obvious.
Effect: Only heals 15 HP (50% of the Bandage), but will give you the Painkiller buff for 30 seconds.
Unique Buff: Become immune to Slowing effects (e.g. taking damage) except crippled, allows you to Sprint at 75% speed when crippled, and certain traps are heavily weakened (Perform a Handstand then get up after tripping from barbed wire, escaping a bear trap is much easier, etc). Also gets rid of any visual effects caused by low HP.