Hydra's Whisper

"This unique demolition tool is a long, metal tube packed with explosives. The Hydra’s Whisper is designed to destroy out-of-reach movement impairing structures and detonate any mines along the length of the tube."

- In-game description

The Hydra's Whisper is a place-able explosive charge that is carried in the shoulder slot. 5 seconds after it's placed three separate explosions are triggered. It destroys obstacles that can otherwise only be dismantled with wrenches (Barbed Wire, Tank Trap, Anti-Tank Mine).

Crafting
The Hydra's Whisper is obtained via production in a Factory.

Historical Reference
The design and icon for the Hydra's Whisper appear to be based off the Bangalore Torpedo series of explosives.