Dirt Rod's Wrath/Plaguefury

The Plaguefury is a post-Moon Lord sword. When swung, it releases shards of Poison and Venom from the sky. This sword can be upgraded to the Eternal Earthblade.

Trivia

 * This is the second elemental sword of the Quaternity Elemental Swords, representing earth.
 * The black and green has a similar theme to the Calamity Mod's plague.