War Drum: Line-Breaking Reverb is a Furnishing. Its blueprint, along with the Ritual Shrine's blueprint, can be obtained behind a Rock Pile located west of the middle of the Heart of Watatsumi, which is unlocked during the "Heart of Watatsumi" quest.
First time creation grants Trust ×90.
There are 1 items that can be crafted using War Drum: Line-Breaking Reverb:
|Gift Set|| Key Fence: Self-Restraint ×4|
Headquarters Alarm: Sound of Thunder ×1
War Drum: Line-Breaking Reverb ×2
Key Gateway: Beneath the Clouds ×1
The Red Kite's Waking and Sleeping ×1
Fence Corner: Long Watch ×3
Official Residence Corridor: Power's Reach ×2
Inazuman Official Residence: Strict Adherence ×1
Sappan and Vermilion Enjoined ×2