Omniblade

The Omniblade is a craftable Hardmode broadsword. It has a fast auto-swing rate and large size, but it does not have a projectile. It has a 20% chance to inflict the Whispering Death debuff, which reduces the target's defense by 50.

Trivia

 * 'Omnir' in the tooltip is a reference to Omnir, the creator of Omnir's mod, one of the first highly popular Terraria mods.