This is a guide on Inva's Skill and how to use it in LET IT DIE: INFERNO (LID INFERNO). This guide covers Inva's strengths and recommended Mastary.
Table of Contents
Inva - Basic Info
![]() | Type | Technician & Attacker |
|---|---|---|
| Preferred weapon | All Weapons |
Inva’s skill immobilizes enemies, allowing you to safely navigate fights against high-level opponents.
They are also a top-tier recommendation for players who want a high inventory capacity to carry more loot.
Inva - Strengths and Weaknesses
Inva - A's initial Skill and Equipments
| Mastery | Inventory Weight +15 Stamina Recovery +10% |
|---|---|
| Weapons | Executioner |
| Skill | Chronos Lock Fires a pulse from your third eye,freezing enemues on hit. |
Using the Skill to Immobilize Targets
Inva's "Chronos Lock" skill shoots a spiraling circle forward. Any enemies hit by it are temporarily paralyzed.
Freeze Duration Varies by Enemy Strength
| Enemy Type | Stop Duration |
|---|---|
| Most Grunt Enemies | Approx. 5 sec |
| Dreamseeker | Approx. 3 sec |
| Nocent Dreamcraver | Approx. 4 sec |
| Gomamusha | Approx. 2 sec |
| Berserk Mironette | Approx. 2 sec |
| Training Area Bot | Approx. 2 sec |
Keep in mind that "Chronos Lock" has a varying crowd-control duration based on enemy tier. Bosses will break free of the time-stop very quickly, so unleash your high-damage combos without delay.
Destroying the Exoskeleton Cancels the Effect
Be aware that destroying an enemy's Exoskeleton while they are frozen will instantly end the time-stop effect.
Breaks Through Enemy Guards
Using the Skill against a guarding Humanoid or Yotsuyama will break their Guard while freezing them at the same time, letting you attack safely without being countered.
Furthermore, when a Lurky Type protects its face with its doors, stopping its movement with this Skill allows your attacks to pierce through and deal damage.
Expand Your Reach with the 3-Way Split Upgrade
Once you unlock the Skill Upgrade via Mastery, the spiraling circle fires forward in three separate directions. This wide spread makes locking down groups of enemies effortless, giving you a massive tactical advantage.
Grouping Targets for a Devastating Deathblow Combo
You can stop multiple grouped enemies at once if they touch the circle—a tactic made even more effective by the Skill Upgrade.
Once they are immobilized, wipe them out using wide-area skills like the Katana's Deathblow or the Metal Whip.
Inva - Recommended Mastery
Inva (Technician) Mastery

The enhancement values when all of Inva's (Technician) Mastery is unlocked are as follows.
- Health +100
- Stamina Recovery +60% (*)
- New Save Weapon Attack +10%
- SWAN Weapon Attack +10%
- Occult Science Weapon Attack +10%
- Inventory Weight +95 (*)
- Acquired SPLithium+ 30%
- Rage Gauge +1
- Skill Cooldown -10
- Skill Upgrade
*Includes initial stats
Inva (Technician) Mastery Unlock Priority

We recommend prioritizing the Skill Upgrade. Until you have enough points, temporarily invest in Skill Cooldown- and Inventory Weight+.
Next, get Rage Gauge +1, and then proceed to get Inventory Weight+ and Attack+.
Priority 1: Skill Upgrade
| Required Points | 22600 |
|---|
The usability of "Chronos Lock" is greatly improved, so prioritize getting the Skill Upgrade.
Priority 2: Rage Gauge +1
| Required Points | 15800 |
|---|
Increasing the Rage Gauge makes Exploration much easier. After getting the Skill Upgrade, prioritize Rage Gauge +1.
Priority 2: Inventory Weight +
| Required Points | 15600 |
|---|
Next, it's recommended to get the Inventory Weight+ on the left tile. Increasing your carrying capacity will make Exploration more comfortable.
Inva (Attacker) Mastery

The enhancement values when all of Inva's (Attacker) Mastery is unlocked are as follows.
- Attack+30%
- Deathblow+20% (*)
- New Save Weapon Attack+20%
- SWAN Weapon Attack+20%
- Occult Science Weapon Attack+20%
- Inventory Weight+30
- Rage Gauge+1
- Skill Cooldown-8
- Skill Upgrade
*Includes initial stats
Inva (Attacker) Mastery Unlock Priority

Inva's Skill is strong, so prioritize getting the Skill Upgrade first. Next, get Rage Gauge +1, then prioritize SWAN Weapon Attack+, as their Weapons are excellent.
Priority 1: Skill Upgrade
| Required Points | 11000 |
|---|
First, get the Skill Upgrade that allows you to fire Chronos Lock in three directions. This makes it much easier to hit enemies when using the Skill.
Priority 2: Rage Gauge +1
| Required Points | 14600 |
|---|
Next, get Rage Gauge +1. It is useful in any situation, so prioritize getting it early. It's also a good idea to get it before the Skill Upgrade.
Priority 3: SWAN Weapon Attack +5%
| Required Points | 11000 |
|---|
Many of SWAN's Weapons, such as the Katana, Wheel Blade, and Chemical Popper, are powerful, so it's also recommended to get SWAN Weapon Attack +5% early.
Inva's Profile
Inva
| Body built for exploration with high carrying capacity. An unknown hyper-advance lifeform kept secret by the Earth Space Agency whose only interest lies in collecting cute stuff. |