Longbow of Expert Marksmanship

Weapon Ammunition (range 150/600), heavy, two-handed Uncommon (this item requires attunement)

This item has 3 charges. You can expend one charge of this item when making an attack with this magical weapon to gain advantage on the attack. If you already have advantage, you can expend one charge of this item to instead reroll one of the dice once, in addition to the reroll granted by advantage. You can choose to expend charges after rolling for the attack, but before the DM declares whether your attack hits or misses. This item regains all of its spent charges every day at dawn.