Umezawa's Jitte-2/3

Magical Attacks: As a bonus action, you may
expend one or more charges. You gain a +1
bonus to attack and damage rolls for each
charge expended this way (up to a maximum
of +3). This bonus lasts up to 1 minute.
Warrior's Grace: As an action, you may expend
2 or more charges. You regain 1d4 hit points for
each charge expended beyond the first. Once
you've used this ability you cannot use it again
until you complete a short or long rest.