Introduction to Sentry Construct Echo Guide

Wuthering Waves Sentry Construct Echo Guide: Sentry Construct is a powerful Overlord-class Echo in Wuthering Waves, identified by its designation W84. As a 4-cost Echo, it plays a vital role in high-end builds, offering strong utility and stats. It was introduced in Version 2.0, expanding the roster of Overlord Echoes available to players. Sentry Construct also features a Phantom variant, known as Phantom: Sentry Construct, which offers a distinct color appearance. This visual change can be applied to all other Echoes of the same type. While it does include a Phantom appearance option, Sentry Construct does not have a Nightmare variant, distinguishing it from other Overlord Echoes with multiple forms.
Echo Skill (Ability)
The Echo Skill for Sentry Construct enables the Resonator to transform into the construct itself, delivering powerful Glacio-based attacks. Upon activation, the Resonator transforms and performs an initial forward strike, dealing Glacio DMG to enemies in front. The damage dealt scales with the Echo’s rarity, with values reaching up to 405.00% Glacio DMG at Rarity 5. This makes the transformation highly effective for burst damage during rotations.
A unique feature of Sentry Construct is its Strike Capacitor mechanic. Each time the Resonator activates their Resonance Liberation, the Strike Capacitor charges. Once it reaches its maximum charge, the Echo Skill’s cooldown is immediately reset, allowing the player to use the transformation again without waiting for the standard cooldown.
When the Echo Skill is used after the Strike Capacitor is fully charged, Sentry Construct performs an enhanced aerial dive, targeting enemies from above. This secondary attack also deals Glacio DMG (scaling up to 405.00% at Rarity 5) and inflicts Freeze on enemies, adding crowd control utility alongside its damage.
When equipped in the main Echo slot, Sentry Construct grants the Resonator two passive bonuses:
+12.00% Glacio DMG Bonus
+12.00% Resonance Skill DMG Bonus
These bonuses significantly enhance both elemental damage and skill effectiveness, making it a strong choice for Glacio-based Resonators. The Echo Skill has a 25-second cooldown, which can be bypassed via the Strike Capacitor, enabling skillful players to maximize uptime and damage output.
Stats (Overlord Class, Cost 4)

As a 4-cost Overlord Class Echo, Sentry Construct has access to high-value main stats and a wide range of sub-stats, making it a strong choice for optimizing both offensive and utility-focused builds. The main stats scale with Echo rank, and sub-stats provide a variety of damage- and support-oriented bonuses.
Primary Main Stats
These are the possible main stats for Sentry Construct at Rank 4 Level 25 or Rank 5:
ATK (Flat): 150
ATK%: 33.0%
HP%: 33.0%
DEF%: 41.8% at Rank 4 / 41.5% at Rank 5
Crit Rate: 22.0%
Crit DMG: 44.0%
Healing Bonus: 26.4% at Rank 4 / 26.0% at Rank 5
Main Stat Progression by Rank (Overlord, 4-Cost)
| Stat Type | Rank 2 | Rank 3 | Rank 4 | Rank 5 |
|---|---|---|---|---|
| ATK (Flat) | 46 | 68 | 92 | 150 |
| HP% | 10.6% | 14.6% | 20.5% | 33.0% |
| ATK% | 10.6% | 14.6% | 20.5% | 33.0% |
| DEF% | 13.5% | 18.7% | 26.0% | 41.5% |
| Crit Rate | 7.1% | 9.8% | 13.8% | 22.0% |
| Crit DMG | 14.3% | 19.7% | 27.7% | 44.0% |
| Healing Bonus | 8.5% | 11.9% | 16.3% | 26.0% |
Sub-Stat Ranges (All Ranks)
| Sub-Stat Type | Range |
|---|---|
| HP (Flat) | 320 – 580 |
| ATK (Flat) | 30 – 70 |
| DEF (Flat) | 30 – 70 |
| HP% | 6.4% – 11.6% |
| ATK% | 6.4% – 11.6% |
| DEF% | 8.1% – 14.7% |
| Crit Rate | 6.3% – 10.5% |
| Crit DMG | 12.6% – 21.0% |
| Energy Regeneration | 5.6% – 14.9% |
| Resonance Skill DMG Bonus | 6.4% – 12.4% |
| Basic Attack DMG Bonus | 6.4% – 11.6% |
| Heavy Attack DMG Bonus | 6.4% – 11.6% |
| Resonance Liberation DMG Bonus | 6.4% – 11.6% |
Sonata Effect: Frosty Resolve

The Frosty Resolve Sonata set is one of the possible effects that can appear on the Sentry Construct Echo, providing powerful bonuses for characters focused on Glacio DMG and Resonance Skill usage.
2-Piece Set Bonus:
Grants a +12% Resonance Skill DMG Bonus, making it a reliable option for enhancing skill-based damage across rotations. This bonus is always active and does not require any activation conditions.
5-Piece Set Bonus:
After casting a Resonance Skill, the equipped character gains a +22.5% Glacio DMG Bonus for 15 seconds, significantly boosting elemental output.
Additionally, casting Resonance Liberation increases Resonance Skill DMG by 18% for 5 seconds.
Both effects can stack up to 2 times, allowing skilled players to maintain both bonuses consistently by rotating between skills and Liberation abilities.
This Sonata effect is ideal for Glacio Resonators who rely on short cooldown skills and burst windows, offering a high ceiling for damage scaling when managed properly during combat.
How to Obtain Sentry Construct

To obtain the Sentry Construct Echo, players must defeat the Sentry Construct boss at its designated challenge location. As an Overlord-class enemy, Sentry Construct presents a significant combat challenge, so players should enter the encounter with a well-prepared team.
The boss is located within the Tactical Hologram: Phantom Pain challenge, specifically found in Thorncrown Rises, an area within Thessaleo Fells in Rinascita. The arena is positioned at the center of a large circular platform near a pier, easily recognizable on the map.
For players looking to unlock the Phantom version of this Echo—Phantom: Sentry Construct—it can be acquired through the Trial Store. The Phantom skin costs 320 Trial Coins, but it becomes available for purchase only after the player has accumulated 1,200 Trial Coins in total. These coins are earned by completing runs of the Tactical Hologram: Phantom Pain challenge.
Consistently farming this boss not only provides a chance to obtain the Echo with high-stat potential and the Frosty Resolve Sonata set, but also progresses Phantom unlocks for cosmetic customization.
Recommended Characters
Sentry Construct is an excellent Echo choice for Glacio-based Resonators who rely heavily on skill usage and burst windows. Its transformation ability, main-slot damage bonuses, and compatibility with the Frosty Resolve Sonata set make it a strong option for characters who scale with Resonance Skill DMG and Glacio DMG.
Overall, Sentry Construct fits best on Resonators who cycle through skills frequently and benefit from elemental amplification, particularly those who naturally align with Glacio or skill-dominant damage profiles.
Frequently Asked Questions (F.A.Q)
What does the Echo Skill do?
It allows the Resonator to transform into Sentry Construct, striking enemies with Glacio DMG. After charging the Strike Capacitor via Resonance Liberation casts, a second use of the skill unleashes a powerful dive attack that deals Glacio DMG and freezes targets.
What is the cooldown of the Echo Skill?
The Echo Skill has a 25-second cooldown, which can be reset by fully charging the Strike Capacitor.
Does it have a Phantom version?
Yes. The Phantom: Sentry Construct cosmetic can be unlocked in the Trial Store for 320 Trial Coins after earning 1,200 coins in total.
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