Soul Whip

Soul Whip is a  weapon added in the 0.9.10 update. You cannot cast the rod for this item, as it will shoot the beam instead.

The Soul Whip does however require level 26 even though it isn't used for fishing.

This weapon can be converted into a dungeon item with wither essence. Once converted, it requires catacombs level 26 to be used in dungeons.

Usage
The Soul Whip can be used as a melee weapon or a ranged weapon.

When its ability is used, it shoots a beam in the direction the player is aiming. This beam has a parabolic trajectory, short range, and pierces foes, dealing its melee damage to all mobs hit. The ability does not consume mana.

Essence Crafting
This sword can be upgraded with wither essence.

Tips

 * It's arguably the be st weapon for grinding Ghosts, as it provides a way of damaging them without getting into their range.