Heartbreaker

Very Rare Maul (Heavy, Two-handed)
Requires attunement

Damage. 2d6+1 Bludgeoning 
Forged with Love. You gain a +1 bonus to attack rolls you make with this weapon.
Aura of the Heart. When attuned to this hammer the heart-shaped gem pulses with a soft light. All creatures within 20ft. of the gem gain a +3 bonus to Charisma and Constitution saving throws. When it shatters the aura fades.
Shattered Heart. When you critically hit a creature with this maul the gem on top of it shatters in a flash of light. All allies within 45ft. that can see you regain an amount of hit points equal to the damage you dealt with the triggering attack +2d6. They also receive the benefits of Aura of the Heart for 24 hours. After the gem has been shattered it magically reforms over the course of 24 hours after which it can be used again.