Terragrim

The Terragrim is a short range, rapidly striking melee weapon, similar to the Arkhalis. It can be found in an Enchanted Sword Shrine in the underground, replacing the Arkhalis which was previously found there.

The Terragrim autoswings, though it does not present an actual blade when used. Instead of an overhead broadsword swing or a shortsword stab, the Terragrim appears as a series of blurred slashes aimed in the direction of the cursor. Anything within this area takes constant damage at a rate far exceeding the weapon's stated use time. This damaging area has a rather wide spread, even attacking behind the player for a very short distance.

The Terragrim's unique means of attack is unaffected by any size and speed modifiers.

Its best modifier is Godly or Demonic. Both modifiers increase its average damage output by the same amount.

Trivia
The Terragrim's name is a reference to the Valmanway from the Castlevania series. Specifically, it references Castlevania: Symphony of the Night, where the Valmanway was instead known as the Crissaegrim. Like the Arkhalis, the Terragrim's function and appearance are also based off of the Valmanway.

The Terragrim appears in the Zenith’s animation despite it not being a material in crafting the Zenith.

The Terragrim may have replaced the Arkhalis in the sword shrines due to the fact the Arkhalis is now found in developer sets only in 1.4, instead of shrines.

History
.   The Terraria thing is kool and I want 1.4