Skip to Content
Protein and CrystalsImmune Protein

🧪 Immune Protein – Farming, Spending & Saving

Immune Protein is one of the most essential resources in Season 1 of Last War: Survival – The Crimson Plague. It’s used to upgrade all critical seasonal buildings and becomes the bottleneck for base progression if not managed properly.

This guide covers:

  • ✅ Where to farm it
  • ✅ What to prioritize
  • ✅ Strategy breakdowns for F2P, light spenders, and whales

🌱 How to Farm Immune Protein

🏭 Protein Farms (Primary Source)

  • Build up to 4 Protein Farms
  • Each level increases hourly production
  • Farms unlock progressively:
    • 2nd Farm → unlocks when 1st reaches Lv5
    • 3rd Farm → unlocks when 2nd reaches Lv10
    • 4th Farm → unlocks when 3rd reaches Lv10

🔧 Upgrade all farms evenly for optimal total output.

🎁 Event & Mission Rewards

  • Plague Crisis – clears grant Immune Protein directly
  • Genetic Recombination – milestone rewards (building/tech)
  • Login rewards, daily quests, season missions
  • Alliance quests and kill events

💳 Optional Purchase Sources

  • Daily/weekly store packs
  • Season Pass bonuses
  • Seasonal event shops and flash offers

🛠️ What to Spend Immune Protein On

PriorityBuildingWhy?
🔝 TopVirus Research InstituteIncreases Virus Resistance – essential for survival
✅ NextProtein FarmsMore Protein = faster long-term scaling
⚔️ LaterTroop Specialty BasesBuffs troop stats (optional early on)
🛰️ SituationalMilitary BaseOnly if doing city war or inter-zone fighting

🧑‍🏫 Strategy by Player Type

Below are recommended strategies for F2P, Light Spenders, and Whales, covering farming, spending, and saving approaches.

🧑‍🌾 Free-to-Play (F2P)

Farming Tips:

  • Focus on events like Plague Crisis and Genetic Recombination
  • Level up and balance your Protein Farms ASAP
  • Use daily stamina efficiently for PvE infected hunts

Spending Priorities:

  1. Maximize VRI early — aim for Lv20+ by Week 3
  2. Build & level 2–3 Protein Farms to ~Lv15 evenly
  3. Avoid upgrading Troop Base until VRI is nearly maxed

Saving Tips:

  • Don’t spend Protein on Military Base or Troop Buffs too early
  • Save a small reserve (~100–150k) going into Week 3–4

💳 Light Spenders

Farming Tips:

  • Buy event passes or small packs that include Immune Protein
  • Unlock all 4 Protein Farms quickly using speedups and Crystals
  • Push in event rankings for higher milestone rewards

Spending Priorities:

  1. Push VRI to 25+ by Week 3
  2. Upgrade all Protein Farms to Lv15–20
  3. Start investing in Troop Base by Week 3–4
  4. Prepare Military Base if alliance is city war ready

Saving Tips:

  • Reserve Protein for event windows to double-dip rewards
  • Store extra for big pushes on VRI/Troop Base later

🐳 Whales

Farming Tips:

  • Maximize all 4 Protein Farms to Lv25+ early
  • Get additional Protein from bundles and store offers
  • Dominate event rankings to earn top-tier milestone rewards

Spending Priorities:

  1. Max out VRI as soon as possible (Week 2–3)
  2. Max out Troop Specialty Base for primary unit
  3. Deploy and upgrade Military Base for war operations
  4. Optionally build alt Troop Bases for flexibility

Saving Tips:

  • Bulk-purchase Protein in advance of major upgrades
  • Prepare for high Immune Protein drain during city wars

❌ Common Mistakes to Avoid

  • ❌ Spending on Troop Base too early (before VRI is done)
  • ❌ Letting farms stay low level or unevenly upgraded
  • ❌ Wasting Protein on a Military Base too early
  • ❌ Not aligning building upgrades with event milestones
Last updated on
Protein & CrystalsMutant Crystals