Season 4 of Last War—Legend Returns—ushers in the eerie and intense Evernight Isle event. The map plunges players into pitch-black combat conditions, with visibility limited and threats intensified. The only salvation? Strategic use of the Lighthouse and Zombie-powered Generators.
In this Last War Season 4 Lighthouse Guide, we’ll break down how the Lighthouse system works, how to manage your generators, avoid harsh penalties, and light your way to both survival and domination on Sakura Isle.
1. Lighthouse — Your Lifeline in the Darkness
Core Purpose:
The Lighthouse is the central mechanic of the Evernight Isle season. Once activated, it dispels the darkness and provides critical buffs:
- Illumination Range Buff: Units within range gain a Light Buff.
- Virus Resistance: Higher brightness = stronger resistance.
- Penalty Mitigation: Units in the dark suffer:
- Zombie invasion risk during Blood Night
- -30% Resource Generation Rate
- -20% Troop Marching Speed
- Increased strength for Zombies and Doom Elite
Brightness Levels & Virus Resistance:
| Brightness Level | Bonus Virus Resistance |
|---|---|
| Level 1 | +50 |
| Level 2 | +150 |
| Level 3/4 | +250 |
The higher the Brightness Level, the wider the illumination zone—but the power cost increases accordingly.
Upgrade Tip:
The Optoelectronic Lab governs your maximum brightness level. Upgrade this lab to unlock the strongest lighting effects.
2. Power System — Keep the Light On
The Lighthouse runs on Power, which comes from two main sources:
- Personal Generators (4 per Commander)
- Alliance Generator (1 via Alliance Tech)
You need consistent power supply to keep your Lighthouse active, especially at higher brightness levels.
3. Zombie-powered Generators — Your Main Energy Source
To generate power, you’ll use the Zombie-powered Generator system. Here’s how it works:
Step-by-Step:
- Repair a Zombie-powered Generator (cost: 700 stones)
- Capture zombies to convert them into usable energy
Generator Progression:
You’ll unlock more powerful versions as your structures evolve:
- Zombie-powered Generator I
- Corpse Power Generator II
- Generator III
- Generator IV
Each level corresponds to a matching Lighthouse and Optoelectronic Lab level. Mismatched upgrades result in suboptimal lighting effects.
4. Alliance Generator — The Cooperative Advantage
Building the Alliance Tech at your Alliance Assembly Point provides power to all members within range.
Benefits:
- No need to individually power all your personal generators
- Buffs apply across the alliance grid
- Better performance during Electric Grid Lockdown and improved Yield Optimization
Tip:
Make this a strategic building location so all allies benefit from enhanced power coverage.
5. Monsters in the Darkness — Buffed & Brutal
Enemies lurking in unlit zones become significantly more dangerous:
- Zombies and Doom Elite gain enhanced attack and defense
- Kill Rewards drop in dark zones
Solution:
Use the “Illuminate the darkness” function from your generator to light up the world map before attacking. Fighting in an illuminated area guarantees full rewards.
6. Daily Resident Missions — Stay Active
Despite the gloom, life on Sakura Isle continues:
- Visit buildings like the Izakaya Bar and Ryōtei Restaurant
- Complete Resident Missions to earn valuable seasonal rewards
These are easy dailies and worth completing for consistent bonuses.
7. Generator Allocation Strategy
Each Commander starts with:
- 4 Personal Generators
- 1 Alliance Tech Slot
Depending on your role, your generator usage should shift:
Combat-Focused Players:
- 2 for self-illumination
- 1 for alliance help
- 1 for max brightness output (boss hunts, Blood Night prep)
Support/Resource Players:
- 1 for self
- 3 for alliance, world map, or treasure lighting
Flexible Assignment:
- Adjust daily based on Blood Night schedules, alliance objectives, and world map targets.
Surviving Evernight Isle is all about visibility and power control. Light isn’t just a visual cue—it’s your protection against devastating debuffs and boosted enemies.
Key Reminders:
- Keep your Lighthouse powered daily
- Upgrade the Optoelectronic Lab to maximize brightness
- Coordinate Alliance Generators for grid-wide protection
- Don’t let your zombies go to waste—capture and convert
- Stay active with Resident Missions for bonus loot
The night may be unforgiving, but with a well-lit strategy, your path to victory will always remain clear.
