When you roll initiative, you may opt to use your Adrenaline Rush feature. If you use this feature, you add 10 to your initiative roll and the surprised condition does not prevent you from moving and taking actions normally. Also when you use this feature, you have advantage on all checks and saving throws made to preform sudden movements, such as a standing jump or dodging a bolt of lightning. When the combat ends, you must make a DC 10 Constitution saving throw or suffer one level of exhaustion. Whenever you succeed on your saving throw against this ability, the DC for this saving throw increases by 5. The DC resets to 10 whenever you finish a long rest.

You may not use your Adrenaline Rush feature if taking a level of exhaustion would kill you.