Ring of the Living Wall (5e Equipment)
From D&D Wiki
Ring, uncommon (requires attunement)
This ring allows you to intercept an attack that would otherwise reduce a creature to 0 hit points as a reaction. You may only intercept the attack if the creature is within 30 feet of you. If the attack against the creature is a ranged attack, you magically move directly in front of the target to block the hit. If the attack is a melee attack, you appear in front of the target, moving the target to the closest unoccupied space within 10 feet. The intercepted attack goes against your AC as opposed to the target's.
Once the ring is used, it cannot be used again until the next dawn.