The Ultimate Last War Survival Season 4 Week 5 Guide: Narrowed Brackets, Summon Mummies & the Williams Stockpile

Week 5 ships the same four missions as Week 4, all starting on Day 1, with identical warzone chest goals. There is no Level 8 city mission and no new event — the week is deliberately quiet so alliances can focus on the war rhythm and on stockpiling. The chest goals are warzone-wide counters, so every commander who joins a rally, collects tax, or fires the faction skill pushes the shared bar.

The only timing quirk is unchanged from last week: Trade Baron's mission goal unlocks 12 hours after the mission appears, while its reward-chest goal is trackable from the first reset. The Warlord chest goal repeats from Week 4, where the in-game counter read 400 Atomic Breath blasts (one warzone cleared it at 643/400) — expect the same target on a fresh counter.

This is the week the matchmaking genuinely changes. In Week 4's copper war opener, alliances were grouped in blocks of ten ranks (Group 1: 1-10, Group 2: 11-20, Group 3: 21-30, plus a catch-all group behind them). From this week's rounds the declaration groups split into six-rank brackets: Group 1 covers ranks 1-6, Group 2 ranks 7-12, Group 3 ranks 13-18, Group 4 ranks 19-24, Group 5 ranks 25-30, and Group 6 is the catch-all for the remaining ranks — No. 31-50 on the server captured for this guide (larger warzones run 31-100). You can only declare war inside your own group, so opponents are now much closer to your size.

Seasoned players will notice how different this is from Seasons 2 and 3, where brackets were static — ranks 1-10 fought each other and ranks 11-20 fought each other every single week. The ladder keeps narrowing after this week too: the Week 3 grouping splits into three-rank brackets (1-3, 4-6, and so on through 28-30, with the catch-all behind), so use this six-rank window while matchups are still winnable for mid-table alliances.

The five-stage weekly cycle is unchanged: Copper totals are recorded at the Monday and Thursday resets, R4+ declares on Tuesday and Friday (one target at a time, up to three alliances per target, changeable until the stage ends), defenders invite same-faction partners on Wednesday and Saturday morning (three attackers allow two partners, two attackers allow one), preparation runs 12:00-12:30 server time, and the battle window opens at 12:30 for 20-40 minutes depending on the matchup.

Roles alternate every round. On the Kage no Sato side, that means attacking in Wednesday's round 3 and defending in Saturday's round 4 — with Koubutai mirroring exactly. Plan for both directions every week: garrisons filled and warehouses reinforced before your defense, Atomic Breath and rally waves ready for your attack.

The plunder math also carries over unchanged: each destroyed warehouse plunders 3% of the defender's Copper, the Alliance Center adds 6%, and the weekly cap stays at 15%. Kill warehouses first — destroying the Center ends the war instantly without touching the remaining warehouses.

Both faction skills remain the centerpiece of every round, and both still launch during the 30-minute preparation phase. The attacking alliance's Warlord fires Atomic Breath — a 35×35 blast that forcibly relocates every base caught in it (without breaking shields), deals 30,000 durability damage to any Alliance Center or warehouse in range, and leaves Contaminated Land for an hour. The launch window is 180 seconds; the Warlord's base is revealed in world chat, and moving it or losing it aborts the shot onto a 72-hour cooldown. The rework is visual too: instead of Season 3's missile launch, the Warlord transforms into a Godzilla-style kaiju and delivers the strike in person, echoing the Ice Godzilla attacks from the zombie invasion event.

The defending alliance's Butler answers with the Tesla Coil: +50,000 durability on any alliance building, 500 damage every 10 seconds across a 21×21 area, lasting up to 300 seconds on a 72-hour cooldown. The Butler stays shielded while operating it, Electricians on the building boost its damage, and the alliance tech adds a further 10%.

The Warlord season mission asks you to fire Atomic Breath at least once during the week's wars — the same counter that read 400 blasts in Week 4. One well-placed shot into the defender's warehouse row satisfies the mission and typically pays for itself in plundered Copper before the Center even falls.

The Trade Baron chest goal repeats at 300,000 warzone tax revenue, fed by the Tuesday and Friday Trade Post contests at 12:00 server time (one hour each). The Level 3 and Level 4 posts remain the priority targets for weapon shards, Training Certificates, and Overlord materials, and the Level 4 shard pool keeps its five-per-person cap — track claims before the post closes.

Tax revenue doubles as war fuel: every Copper coin your Trade Post Lords collect also raises your alliance's recorded Copper, which decides your declaration group at the Monday and Thursday snapshots. Holding posts through the week is therefore both a mission contribution and bracket positioning.

Keep the Governor based on the Contaminated Land adjacent to your post for restocks, purchase discounts, Golden Egg taxes, and the Magatama Trade Caravan during Blood Night — and if you bought the Trade Discount profession skill, the extra 10% off post purchases stacks on every restock this week.

Blood Night Descend continues three times daily at 02:30, 10:30, and 18:30 server time, 30 minutes each, inside Stage 3 'Doomsday Crisis: Oni Legions' (running Weeks 3-7). Oni Legion Doom Walkers spawn across the map and prioritize attacking lit bases, monster Virus Resistance sits 500 points higher, and breached bases take an extra 500 Commander Durability Damage from corrosion.

Stage 3 remains the season's best Magatama and Tactics Card window: Tactics Card Pack drop rates rise 30% during descents (up to five cards per day), and the Oni Summon profession skill (Level 80, learnable since Day 15) lures an Oni Legion to your position for five minutes of chained kills. Keep the Lighthouse on Brightness Auto-Adjustment — even Level 1 light makes your base immune to active attacks while full brightness burns 18,000 drain per minute.

If your alliance captured Tenryu Castle last week and its buffs are still locked, Stage 3 is your reminder: city buffs stay sealed until the alliance kills the Oni General that besieges the city during a descent. Rally the General at the next 02:30, 10:30, or 18:30 window — the Level 7 Capitol's buff is the largest single stat swing left on the map.

Week 5 is the free-to-play deadline for the season's decisive profession skill. Summon Mummies unlocks at Profession Level 85 for a single skill point, requires Protector's Field Level 25, and summons a 37.5-million-power mummy boss that marches for 30 minutes, deals 10,000 durability damage when it breaks a base, and forces even shielded defenders to react — on a 71.5-hour cooldown. Community consensus across every season guide calls it the must-have Copper War skill, and with rounds 3 through 8 still ahead, this is the week to cross the line.

If you are still short of Level 85, the supporting ladder pays off in order: Lightfall (Level 70) keeps a breached base's lighthouse dark for three minutes, Disruption Mine (Level 75) blocks relighting for three minutes from a deployed mine, and Oni Summon (Level 80) doubles as your Blood Night farming engine. Both professions — Engineer and War Leader — share the same seasonal tree, so this is about points, not labels.

Above Level 100, profession EXP converts into core Tactics Card upgrades, so the daily Top Up EXP routine (up to 100,000 EXP from returning electricians) stays worth running every single day through the war weeks.

Williams' Exclusive Weapon Battle Pass arrives on Day 4 of Week 6, and Week 5 is the last full week to prepare for it. Every community guide for this stretch gives the same instruction: stop spending. Weapon Shards, Exclusive Weapon shards, hero shards for Williams, and seasonal resources you stockpile now convert directly into day-one weapon levels when the pass opens.

That does not mean going passive. The season's compounding systems — Lighthouse upgrades whenever materials allow, daily missions and Battle Pass objectives before each reset, alliance rallies, and the war rhythm itself — all keep paying while you hoard. The trap to avoid is the mirror image: commanders who read 'preparation week' as a quiet week lose the most ground, because war participation, tax collection, and Blood Night farming are exactly the engines that fund the Williams push.

A practical split that works for most alliances: spend on nothing that does not survive into Week 6 — war consumables, Lighthouse materials, and profession points are all keepers; cosmetic gacha, impulse Trade Post gambles, and anything time-limited that expires unclaimed are not. The two best sinks this week are the Lighthouse, which should climb several levels with the materials you are hoarding, and Protector's Field: with the rest of the season buildings built out, every remaining material moves it further — it raises the protector limit while adding HP, attack, and defense boosts to your teams, and its Level 25 gates Summon Mummies, the exact skill Part 6 targets.

Week 5 rewards repetition over novelty. Monday: bank Copper before the snapshot and read your new declaration group. Tuesday: agree targets in leadership chat and contest the first Trade Post. Wednesday: fill every garrison, launch the faction skill in preparation, fight at 12:30, claim before midnight. Thursday through Saturday: the same loop with roles swapped, and Blood Night farming between everything. Every day: Top Up EXP, Lighthouse progress, and one look at the Williams stockpile sheet. One deadline to flag: the Ryōtei Restaurant runs only through Week 7 — saved stages do not need daily play, but clear them before the window closes or they expire.

By Sunday you should have four cleared mission chests, a Summon Mummies button on your bar, a fuller shard inventory than you started with, and a war alliance that has fought in both directions. That is the complete launchpad for Week 6 — Williams' Exclusive Weapon on Day 4, the Faction Duel teaser at the end of the week, and the hardest Copper War brackets of the season right behind them.