Rare magic weapon (long sword)
Property: You gain a +1 bonus to the attack rolls and the damage rolls you make with this weapon. On your turn, as part of your action, you can toss the sword into the air and command it to dance. The sword moves 30 feet and attacks a creature within 5 feet of it that you choose. You make this attack as if you were wielding the sword. As part of your action on each of your turns after you use this effect, you can move the sword up to 30 feet and repeat the attack against a creature within 5 feet of it. After 3 rounds, if it has an unobstructed path to you, the sword speeds back to your grasp, if you have a hand free. If you don’t, the sword falls to the ground at your feet. Otherwise, it moves as close to you as it can and then drops to the ground.
Etchings along the blade’s length depict blowing, spinning leaves and leaping, twirling blades. Drawing the sword causes it to twitch and jerk, as if eager to be free of the hand holding it. Such weapons are sought by warrior mages, who are adept with both sword and spell. They delight in harrying their foes in melee with dancing swords as they step back and unleash an onslaught of magic. The first dancing sword was forged at the request of a once-‐powerful king who gained the throne by force of arms. Grown old and tired, he commissioned a blade that fought with the strength and fury of his youth.