Null Charm

The Null Charm is an item added by Dark Utilities. The Null Charm destroys specified items when picked up when in the player's inventory or their Baubles charm slot.

Usage
Right-clicking the Null Charm on air opens a GUI with 5 slots. Placing an item into one of the slots marks it for destruction. Once specified, all items of that type are destroyed immediately on pick-up. Partial stack(s) in the player's hotbar are not refilled prior to destruction. Multiple Null Charms will coexist happily in a player's inventory.

Known bugs
As of version 1.8.1, shift-clicking items into the Null Charm will result in a client freeze.