Persistent

You are relentless in battle, able to turn misses into hits through quick recalibration and even when you are weak, as if by sheer willpower, you refuse to die.

• Increase your Constitution score by 1, to a maximum of 20.
• 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.
• Once per turn, when you miss a weapon attack you took as part of your action, you may reroll the attack as a bonus action.