You can intentionally hurt yourself to add half of however much damage you take to one base character stat modifier of your choice. After this modifier is used, it is reset to its regular value. Pain is an old friend and nothing new to you, so why not harness its potential?

Twice per combat (with a 3 turn cooldown), you can be immune to being incapacitated, frightened, stunned, or paralyzed (pick one) until the beginning of your next turn. This is treated as a reaction and can be used to prevent a condition from effecting you even during another creatures turn

You gain Heroic Inspiration whenever you finish a Long Rest.

You gain proficiency in one skill of your choice.

You gain an Origin feat of your choice.