Die Hard

You're a bloody bastard to try and kill.

• Your Constitution Score increases by 1 (up to a maximum of 20).
• The first time you are reduced to 0 hp in an encounter, instead you are reduced to 1 hp. You can gain the benefits of this ability once per long rest.
• You have 1 extra check on your dying track. Instead of dying at 3 failed checks, you die at 4. It still takes 3 successes to stabilize.