Season 4 Overview: Evernight Isle
The darkness season: keep your Lighthouse lit, survive Blood Night three times a day, collect Tactics Cards, and win the Copper War.
Evernight Isle (set on Sakura Isle, with a Japanese theme) plunges the island into darkness. The idea: control the light, control the night.
At a glance
| Topic | Details |
|---|---|
| Pre-season | 2 weeks |
| Season | 8 weeks |
| Core mechanics | Lighthouse power, Blood Night, Virus Resistance |
| Season resources | Stone, Quartz, Magatama (shop), Copper (ranking) |
| New system | Tactics Cards |
| Factions | From week 3: Kage no Sato vs Koubutai |
Week by week
| Week | Highlights |
|---|---|
| 1 | Digging Strongholds. Blood Night starts (day 2). Alliance Center. Tactics Cards unlock. Lucius's Exclusive Weapon |
| 2 | Wandering Oniwagon on Blood Nights. Divine Tree. Blood Night Hunter. Level 3–4 cities |
| 3 | Sarah SSR→UR. Faction Selection. Oni Legion. Trade Posts. Adam's weapon |
| 4 | Copper War begins (Wednesday and Saturday). Tenryu Castle (Capitol) opens |
| 5 | Copper War brackets narrow |
| 6 | Williams's weapon |
| 7 | Final Copper War rounds, Faction Duel, War's Eve |
| 8 | Settlement, Holy Mountain ends Blood Night, a second Capitol Conquest |
Season Boosts
Sarah deals +10% damage to monsters, and Lucius, Adam and Williams take less damage from them. The Silverclaw Fighter base skin ignores the darkness march-speed penalty.
Seasonal buildings
- Optoelectronic Lab (up to level 35): your Virus Resistance. It also caps your Lighthouse brightness and unlocks more Generators.
- Quartz Workshops: produce Quartz. The next unlocks at level 15, then level them evenly.
- Lighthouse and Generators: your light. See Lighthouse, Blood Night & the Copper War.
- Alliance Center: its Stone, Oil and Magatama warehouses unlock on days 7, 14 and 21.
Heroes and Tactics Cards
- Exclusive Weapons: Lucius (week 1), Adam (week 3), Williams (week 6).
- Sarah SSR → UR from week 3.
- Tactics Cards debut. Core Cards are permanent, and Battle and Resource cards are seasonal. Favorites include the Hybrid Squad (4+1) card, Counter Reversal and Zombie Killer.
Off-season
The Season 4 off-season brings the Canyon Storm battlefield and, importantly, T11 troops through the Armament Institute. You'll need HQ 27+ and Barracks 35 to train them.
Sources
Compiled from community guides (last checked October 2026). Season details changed between servers and patches, so trust the in-game Season screen if something differs.