Gungnir Spear of Odin (5e Equipment)
From D&D Wiki
Weapon (Spear), Rare (requires attunement)
Gungnir Spear of Odin
Damage: While wielding Odin’s Spear 2 handed the point of the spear becomes honed on the target. Dealing 1 d12 damage.
When throwing Odin’s Spear the damage is significant as well but is reduced to 1 d6+1 d4 damage.
Special Damage: After a throw if the spear stuck an opponent it does an additional 1 d6 damage upon removing itself violently from the opponent.
Special ability: Like Muljnir, Gungnir will always return to the hand of its wielder. On any throw, missed or hit, the spear will return to the hand of the wielder at the end of the turn before the next round begins. Until the beginning of the next combat cycle the wielder is without a weapon.