Boisterous Echoes
Last updated 2026-07-07
Boisterous Echoes is an 
-Rank W-Engine for 
Agents.
Modifications and Stats
| Modification Level | Level | Main Stat (Base ATK) | Sub Stat (Anomaly Proficiency) | Modification Costs |
|---|---|---|---|---|
| 0 | 0/10 | 40 | 30.0 | (0 → 1) 9,600 |
| 10/10 | 102 | 30.0 | ||
| 1 | 10/20 | 138 | 39.0 | (1 → 2) 22,400 |
| 20/20 | 201 | 39.0 | ||
| 2 | 20/30 | 236 | 48.0 | (2 → 3) 48,000 |
| 30/30 | 299 | 48.0 | ||
| 3 | 30/40 | 335 | 57.0 | (3 → 4) 80,000 |
| 40/40 | 397 | 57.0 | ||
| 4 | 40/50 | 433 | 66.0 | (4 → 5) 160,000 |
| 50/50 | 496 | 66.0 | ||
| 5 | 50/60 | 532 | 75.0 | — |
| 60/60 | 594 | 75.0 |
320,000
Description
Upgrade
Upgrading Boisterous Echoes requires the material 
Child at Heart instead of copies of the W-Engine. These could be obtained through the Assemble! Mock Exam Comeback Plan Event.
Availability
- Boisterous Echoes is only available during the Assemble! Mock Exam Comeback Plan event in Version 3.0.
Gallery
W-Engine Boisterous Echoes Icon
W-Engine Boisterous Echoes
Other Languages
| Language | Official Name |
|---|---|
| English | Boisterous Echoes |
| Chinese (Simplified) | 咚哒回声 |
| Chinese (Traditional) | 咚噠回聲 |
| Japanese | ドンカツエコー Donkatsuekō |
| Korean | 둥둥 메아리 Dungdung Meari |
| Spanish | Ecos bulliciosos |
| French | Échos retentissants |
| Russian | Тадам- Tadam-baraban |
| Thai | Boisterous Echoes |
| Vietnamese | Tiếng Vọng Vang Dội |
| German | Ausgelassene Echos |
| Indonesian | Boisterous Echoes |
| Portuguese | Eco Rítmico |
Change History
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