Celestial Orichalcum Lance (5e Equipment)

Weapon (lance), legendary (requires attunement by a creature of good alignment)

You have a +3 bonus to attack and damage rolls made with this magic weapon.
If you hit a fey or undead with this weapon, it takes an additional 3d6 radiant damage and must succeed on a DC 17 Wisdom saving throw or be banished back to its home plane, if it isn't already there. It can't leave that plane until 24 hours have passed.