Amulet of Unblessing

When damaged by an attack you can use your reaction to take 1 more damage for each damage dice rolled in the attack (can't resist it) that hit you and take a plus equals to number to your first next melee attack damage and attack roll (1d6 damage give +1, 4d6 give +4 etc). The bonus can only be used once in a minute after it was earned. If there is already a bonus in it and you use the amulet again then the bonus is replaced with the new one