Storm Ruler

The Storm Ruler is a craftable Hardmode broadsword that autoswings. When swung it shoots out a projectile which, upon impact with an enemy or tile, spawns a small tornado similar to the one the Cloud Elemental spawns. The tornado lingers for 10 seconds, hits 4 times per second with infinite piercing, dealing damage to enemies that come in contact with it. The tornado also pulls in enemies similarly to the Wind Blade.

Trivia

 * This weapon is a reference to a sword of the same name from Demon's Souls and Dark Souls III.
 * The tooltip is a quote from Dark Souls lll, also involving the sword.