Amulet of Sin (Lust)

Once per long rest, you can use a bonus action to enter a state where you embody power, exuding what many desire but don't express for 1 minute. While in this state, people seem to be drawn to you in their lust for power and your Charisma score increases by 4 to a maximum of 22.

The amulet has 4 charges and regains its expended charges daily at dawn. You can expend 1 charge to get one of the following effects: 

• When a creature you can see within 60 feet of yourself succeeds on an attack roll, an ability check, or a saving throw, you can use a reaction to magically distract the triggering creature and turn its momentary uncertainty into encouragement for another creature. The triggering creature must reroll the d20 and use the lower roll. You can then choose a different creature you can see within range (you can choose yourself). The chosen creature gains hit points equal to the difference of the two rolls. 
• As a bonus action whenever you make a Persuasion check you can spend one charge to roll an additional d20. You must choose to do so before the roll, and you can do so only once per turn.

Notes: Can only attuned one Amulet of Sin at the same time. For a given player, any Amulet of Sin will always have the same effect when attuned.