Martyr

When a creature within 5ft of you is about to take damage, you can use a reaction to take damage in their place. You may wait to see if the attack would hit the defending creature, but you must choose to use this ability before the attacking creature rolls damage.

• If your AC is above the attacking creature's attack roll, you take 1/2 damage.
• If the attacking creature's attack roll is at or above your AC, you take full damage.
• You either shove the creature you are defending 5ft away from you or swap places, your choice.
• If you fall to 0HP while using this feat, the creature you defend has advantage on all attack rolls and does +1 damage against the creature that hit you for their next 2 turns.
• At 7th level, any attacks against the creature you defend have disadvantage until the beginning of their next turn.