The Endless Cursed Dart Box is a Hardmode item that acts as ammunition, and can be placed in the Ammo slots in the player's inventory. While in the user's inventory, it acts as a single Cursed Dart that can be fired from any appropriate Blowpipe, Blowgun, Dart Pistol, or Dart Rifle without being depleted.
Crafting the Endless Cursed Dart Box requires 4 full Cursed Dart stacks (999 each).
The Endless Cursed Dart Box follows the same ammunition priority rules as other ammo types. If held in the inventory, Darts in the dedicated ammo slots will be fired first, followed by those further up and to the left in the player's inventory. While in the ammo slots, those above it will be fired.
The cost of 3996 Cursed Darts is no value. There is no profit in producing Endless Cursed Dart Boxes for resale.