Iron Reflexes (5e Feat)
From D&D Wiki
Prerequisites: Dexterity and Constitution 13 or higher
You trained yourself to dodge out of dangerous situations and and endure battles longer . You gain the following benefits:
- Your hit point maximum increases by an amount equal to your level, and it increases by 1 every time you gain a level.
- When you are subjected to an effect that allows you to make a Dexterity saving throw to take only half damage, you instead take no damage if you succeed on the saving throw, and only half damage if you fail.