Amulet of Retributive Mirror

Wondrous item, legendary (requires attunement)

This amulet pulses with a faint, protective light.

Once per long rest, when you take damage that would reduce you to 0 hit points, you can use your reaction to activate the amulet's power.

When activated, you drop to 1 hit point instead, ignoring the rest of the damage. Additionally, the creature that dealt the damage to you takes the same type of damage equal to the amount of damage you would have taken.

Charges: 1
Reset: Long Rest

Notes: Amulet of Retributive Mirror, Requires Attunement - True