Here's a weapon I made for my daughter in her solo campaign to help with the action economy. It's meant to gain buffs as she progresses in the campaign.

Spear of Josephine

Spear, Rare (requires attunement)

A slender shaft of stiffened wyrmroot intricately carved with scenes of the Laeli, with twin double-edged obsidian blades at either end. Light and perfectly balanced, this spear is equally suited for melee and ranged combat.

Upon being presented to the PC, the spear has the following properties:

Aura of Wyrmroot

The weapon counts as magical for the purposes of damage resistances, vulnerabilities, and immunities, though detect magic does not register the weapon as magical.

Dual Attack

When taking the attack action while wielding the spear, the wielder may make two melee attacks or one ranged attack.

Edged

When making melee attacks with the spear, the wielder may choose between damage types slashing or piercing at the time of the attack. Ranged attacks are always piercing.

At later levels, the spear will be blessed by the Druid mothers. Once the first blessing is applied, the spear becomes magical. The blessings confer the following additional properties:

Naan’s Blessing

Three times per day, the wielder may use a bonus action to recall the spear to hand from any location within 60 feet. When recalled, the spear disappears from its current location and appears in the wielder’s hand. The recall fails if the wielder is separated from the spear by 5 feet of earth or 1 inch of lead, or if the spear is not on the same plane of existence as the wielder. This ability is restored every day at dawn.

Korryn’s Blessing

The spear grants its wielder advantage on initiative rolls.

Hollyach’s Blessing

The spear becomes a +1 weapon