Poisoned Piston

The Poisoned Piston is an item associated exclusively with adding an effect to weapons crafted through the Forging Interface.

Crafting
The item is crafted using 5 Wood, 15 Rich Mahogany and 3 Stingers at an Anvil.

Effect
Adding the item to the Effect Slot in the Forging Interface will result in your weapon creating leaf particles when swung, and having a chance to poison enemies for 7 seconds.

The formula for calculating the chance is:

60/aps/120, where 'aps' is the attack speed in attacks per second.