Cartouche of Strength

This amulet is carved from lapis lazuli with scenes of powerful feats, and seems to glow emerald-green from within. While attuned to the cartouche, you gain a +1 bonus to damage on all attack rolls. Whenever you reduce a creature to 0 hit points with a melee attack, you can use your reaction to make a single melee weapon attack. In addition, once per long rest when you make a melee attack, you can choose to make the attack with disadvantage; if you do, you deal an additional die of damage if the attack hits. If you are attuned to at least three cartouches, this bonus increases to two additional dice of damage; if you are attuned to five cartouches, this bonus increases to three additional dice of damage. While attuned to a cartouche, any other cartouches do not count towards the number of items you can attune to. The damage bonus granted by this cartouche increases by +1 for every cartouche you are attuned to.