Leviathan

You’re notorious for being big or dangerous. You gain the following benefits.

Ability Score Improvement. One ability score of your choice increases by 1 to a maximum of 20.

Apex Predator. Your Hit Point maximum increases by 1 for each level you've obtained. Your Hit Point maximum increases by 1 again each time you level up after taking this feat.

Terrifying. Once per round when you miss an attack against a single target, the target still takes Psychic damage equal to your proficiency bonus.