Secret Operations Center: Reroll Odds, 16th Chest Pity & Treasure Maps
Comprehensive guide to Secret Operations in Last Asylum: Plague: reroll odds (UR 8%, SSR 24%), 16th chest pity guarantee, 7-piece treasure maps, plunder caps, and VIP features.
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🗓 Updated: 2026-09-15
The Secret Operations Center is a permanent headquarters building and a vital daily pipeline for free diamonds, Golden Recruit Tickets, Treasure Map fragments, and development resources in Last Asylum: Plague.
Secret operations require zero stamina, risk zero soldiers, and directly yield points for both Alliance Duel and Kingdom War (KvK)!
🎯 Task Rarities & Reroll Odds
Tasks appear in 5 rarity tiers: Common (White), Uncommon (Green), Rare (Blue / SR), Epic (Purple / SSR), and Legendary (Gold / UR).
Free task refreshes are awarded daily and during 3-day cycle resets. Refresh odds are distributed as follows:
| Task Rarity | Refresh Chance | Primary Rewards |
|---|---|---|
| UR (Legendary) | 8% | Diamonds, Golden Recruit Tickets, 15% Treasure Map fragment chance, top event score |
| SSR (Epic) | 24% | Diamonds, Purple Skill Badges, 5% Treasure Map fragment chance |
| SR (Rare) | 68% | Resources, speedups, baseline skill badges |
[!TIP] Reroll Strategy Always discard Common (White) and Uncommon (Green) tasks. Strive to lock in SSR and UR assignments — they account for the vast majority of diamonds, treasure maps, and competitive event points!
🗺️ Treasure Hunter & The 16th Chest Pity System
Completing high-tier secret tasks grants a chance to acquire ancient Treasure Map fragments:
- SSR Tasks: 5% chance to drop a Treasure Map fragment.
- UR Tasks: 15% chance to drop a Treasure Map fragment.
There are 7 unique Treasure Map fragments in total (Numbered 1 through 7).
💎 Hidden Pity Guarantee:
[!IMPORTANT] The 16th Chest Rule: If you open 15 consecutive chests without receiving a single UR card, the 16th chest is guaranteed to contain a UR Treasure Map fragment!
Your bad luck is strictly capped by the game system.
Treasure Expeditions & Alliance Swaps:
- Full Set Expedition: Collecting all 7 unique pieces unlocks a legendary treasure expedition yielding monumental rewards.
- Alliance Trading: If you receive duplicate fragments (e.g., two copies of Piece #3), you can list duplicates on the alliance trading board to swap with guildmates.
⚔️ Plunder and Assistance Caps
- Plunder Limit: You can plunder up to 5 foreign operations per day. Plundering awards free resources with zero troop casualty risk.
- Assistance Limit: You can provide assistance to alliance members up to 5 times per day, speeding up their transit time and earning helper rewards.
- Queue Capacity: Each expedition dispatch queue can handle up to 4 secret operations concurrently.
- Zero March Slot Consumption: Secret operations do NOT consume standard world map march slots, allowing simultaneous resource farming and monster hunting.
🔓 Sanctuary 27 Unlocks: Super Refresh & Super Deploy
- Sanctuary ≥ 27 opens Super Refresh — one-button refill of the whole board to golden (UR) rarity — and Super Deploy, which auto-dispatches the full board at once (check troop counts first: Super Deploy commits everything visible).
- Aim for gear stones and skill badges as the recurring bonuses; the headline rewards are UR shards, and a good refresh lands 3–4 per day (~4 UR shards/day is the benchmark high rollers hit).
- Even if you sleep on it: yesterday’s unfinished 4-day boards sitting at 12/12 (after overnight) are worth keeping, since partial bonus overlap with the next morning’s dispatch still cashes out.
👑 VIP Unlocks for Secret Operations
VIP level progression progressively automates and supercharges operations:
- VIP 6: Unlocks Auto-Dispatch for one-click assignment.
- VIP 10: Batch queue management and instant auto-collection.
- VIP 12: Unlocks Super Mode (Super Operations), granting vastly amplified milestone rewards and accelerated task completion times.
📋 Daily Checklist
- Refresh tasks to eliminate Common/Uncommon slots, aiming for SSR and UR.
- Dispatch all 4 slots on active tasks.
- Plunder 5 foreign operations for risk-free loot.
- Assist 5 alliance members in the alliance overview tab.
- Check the Treasure Hunter tab to trade duplicate fragments with guild members.
📊 Score & Reward Tables
Verified values from game client data (v1.0.87), source: wiki-last-asylum.com. Base values shown without Academy or event research bonuses.
Source: wiki — covert-ops
Top line (quality 5)
| Level | Heroes needed | Time | Hero XP | Also gives |
|---|---|---|---|---|
| 1 | 1 hero lv 25, 1 of quality 5, 1 at stars 1 | 4 h | 913,770 | Secret Reward 32, UR Hero Omni Shard 1 |
| 2 | 2 heroes lv 65, 1 of quality 5, 2 at stars 2 | 4 h | 3,069,000 | Secret Reward 62, UR Hero Omni Shard 1 |
| 3 | 2 heroes lv 90, 2 of quality 5, 2 at stars 2 | 4 h | 7,108,200 | Secret Reward 92, UR Hero Omni Shard 1 |
| 4 | 3 heroes lv 100, 2 of quality 5, 2 at stars 3 | 4 h | 9,108,000 | Secret Reward 122, UR Hero Omni Shard 1 |
| 5 | 3 heroes lv 110, 2 of quality 5, 1 at stars 4 | 4 h | 12,177,000 | Secret Reward 152, UR Hero Omni Shard 1 |
🎥 Video guides
Curated video guides and strategic breakdowns from community creators
📝 Text Transcript 11:26 (686 сек) ▼
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❓ FAQ — Frequently Asked Questions
What is the best F2P team in Last Asylum: Plague?
The canonical F2P squad is Arthur, Daskal, Marlena, Harper, Claire (all Warriors — mono-faction gives +20% HP/ATK/DEF). Arthur is free from day 1; the $1 Marlena top-up is considered the best value in the game. Daskal arrives in the first Era of Revival season (day 120+).
What should I upgrade first?
Sanctuary first, always — it gates every other building and your hero level cap. Then Training Grounds, Barracks, Research Lab, Infirmary, Wall. Keep the Builder’s Hut at Sanctuary level until Sanctuary 15 for free construction speedups.
When does Marlena unlock?
Day 66 for free — or immediately via the $1 starter top-up. Save UR shards so she lands at 8★ right away, then push 10★.
How do I get Cynthia as F2P?
Cynthia arrives via the Wishing Wheel on day 8. Save diamonds from day 1 (skip everything else) — ~11,500 diamonds total, and always spin ×10 (single spins waste tokens).
How do I get antitoxin?
Antitoxin Workshop + Stable production, every building upgrade completion, Falcon Quests (nearly all of them), Covert Ops and Caravan Trade (including plundering others’ ops — up to 5/day), and Blight/Elite Blight hunts (10/20 stamina). Events pay large amounts.
Why did my plunder income drop to almost nothing?
You hit the daily plunder limit: below the limit 100%, from 1× the limit you keep only 15%, from 1.3× only 5%. It resets at 02:00 UTC. The limit scales with Sanctuary level (2.5M at Lv.10–12 up to 30M at Lv.30) and rises immediately when you upgrade Sanctuary. A yellow triangle under your Might shows the status.
What should I buy in the shops?
Sanctuary/Expedition/Alliance shops: Crow Essence and UR Hero Omnifragments first. Honor shop is for gear blueprints only (never epigraph chests there). All shops restock Monday.
Are diamonds worth spending on speedups?
Only the VIP-shop 8h speedups are considered acceptable purchases — and only after hero resources. Community rule: never dump diamonds into speedups over hero wheel events (Cynthia day 8, Joker after day 15).
What faction should I build?
Warriors are the best early game (free Arthur/Harper shards, $1 Marlena). Rangers peak mid game (counter Warriors). Warlocks are the best late game but need heavy long-term investment. Mono-faction (5 heroes of one type) is the current meta because UR epigraphs buff a single faction.
How does Claire SSR→UR conversion work?
Opens on Era Day 8. She lands at 6★ and the run to 10★ costs 1,600 SSR shards (each substage costs 2× the SSR price). There’s a team-buff dip between 6★–9★ — skip it by banking Hall of Honor levels before converting (Lv.60→8★, Lv.100→9★, Lv.160→instant 10★).
How do I redeem gift codes?
In-game: Avatar (top-left) → Settings → Gift Code. iOS or web: log in at the official redemption page with your linked Facebook/Google account, pick server and character, enter the code.
What are the biggest beginner mistakes?
Upgrading everything equally instead of one main squad; judging heroes before high stars (Marlena is the classic late bloomer); splitting Awakening materials across heroes; wasting gems on VIP levels over hero wheels; skipping daily plunder (~27M resources/day); letting stamina cap.
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