Hercules Beetle

The Hercules Beetle is a Hardmode, post-Plantera accessory that increases the damage of all of your minions by 15% and also increases their knockback. It is purchased from the Witch Doctor for, whilst the Pygmy Staff is in your inventory, Plantera has been defeated, and the Witch Doctor is in the Jungle.

Trivia

 * The Hercules Beetle is the largest species of rhinoceros beetle.
 * As it grants 15% increased summon damage and increased minion knockback, it can be considered an upgrade to the Summoner Emblem.