Action Surge, On your turn, you can take one additional action. You can use this 1 time per short rest.   Indomitable. You can reroll a saving throw that you fail - you must use the new roll. You can use this 1 times per long rest.   Piercer. You can reroll a saving throw that you fail - you must use the new roll. You can use this 1 times per long rest.   Relentless Endurance. When you are reduced to 0 hit points but not killed outright, you can drop to 1 hit point instead. You can’t use this feature again until you finish a long rest.