War Horn

War Horn is a new item in Risk of Rain 2. It increases your attack speed modifier by 0.7 for 8 seconds any time you activate your equipment.

Synergies

 * Collecting this item in conjunction with a low-cooldown Equipments,, and multiple  can allow you to keep the bonus indefinitely.
 * with only Gesture of the Drowned will allow you to keep the attack speed bonus without any fuel cells.