Last Asylum Plague Undead Siege
Undead Siege is a permanent alliance event where a Death Prison full of infected Blights sends 20 waves against the territories of your alliance members. Members gather clues with Falcon Quests, an R4 or R5 member locates the prison and picks one of 10 difficulty levels, and every member defends their own territory. Your rewards grow with the waves you survive, and the alliance earns more as the total of defended waves climbs.
How Undead Siege Works
A death row prison, wrapped in thick fog, was struck by the plague. The inmates and guards turned into savage Blights, and now hordes of them threaten the alliance. The fog hides the prison, so you cannot attack first. You collect clues, locate the prison, prepare your defenses and then survive the assault. The event is always available, and R4 or R5 members activate it. Most of the work for regular members is preparation, because the fight itself needs very little input.
Each wave sends enemy troops at the territories of eligible members. The Blights ignore shield protection, so the defending squad is what matters. Once a territory is breached, the Blights stop targeting it for the rest of the event. Members who survive more waves earn better personal rewards. The alliance rewards depend on the total waves that all members survive together.
Falcon Quest Clues
Alliance members collect clues by finishing Falcon Quests. Each completed quest adds clue progress, and large quests such as rebels and Blight legions give the most. When there are enough clues, R4 and R5 members can send Falcons to find the prison. The Falcon Tower page explains the Falcon Quests and where to find them.
| Falcon Quest | Clue points |
|---|---|
| Defeat Rebels | 300 |
| Vanquish Blight Legion | 300 |
| Slay Wandering Blight | 300 |
| Clear Blights | 10 |
| Aid Alliance Members | 10 |
| Resource Recovery | 10 |
| Harvest Resources | 10 |
| Alliance Excavation | 10 |
Undead Siege Difficulty Levels
Before the search, R4 and R5 members pick the difficulty. Higher levels bring stronger enemies and better rewards. Level 1 asks for at least Sanctuary 15, and R4 or R5 members should choose a level that the Might of the whole alliance can survive. Each level has 20 waves. From level 2 on, a level opens only after 20 alliance members have defended every wave of the level below. The enemy Might at level 10 is about 10.1 times the enemy Might at level 1.
| Difficulty | Waves | Enemy Might | Unlock rule |
|---|---|---|---|
| Level 1 | 20 | 2.41M | Open |
| Level 2 | 20 | 3.29M | Clear level 1 with 20 members |
| Level 3 | 20 | 4.23M | Clear level 2 with 20 members |
| Level 4 | 20 | 6.09M | Clear level 3 with 20 members |
| Level 5 | 20 | 8.01M | Clear level 4 with 20 members |
| Level 6 | 20 | 11.52M | Clear level 5 with 20 members |
| Level 7 | 20 | 14.02M | Clear level 6 with 20 members |
| Level 8 | 20 | 17.41M | Clear level 7 with 20 members |
| Level 9 | 20 | 20.16M | Clear level 8 with 20 members |
| Level 10 | 20 | 24.47M | Clear level 9 with 20 members |
Undead Siege Walkthrough
- Complete Falcon Quests with your alliance until the clue bar is full.
- An R4 or R5 member chooses the difficulty and sends the Falcons. The search runs on a countdown and then marks the prison on the map.
- The R4 or R5 member schedules the challenge. The game rejects a start time that comes too early, because members need time to prepare.
- Before the first wave, put your strongest squad in defense through Reinforcement and Garrison, or through Walls and Fortifications.
- Watch the wave counter. The attackers come as Wardens, and a Warden can turn into a Rabid Warden. Defeating a Rabid Warden pays enhanced rewards to every member of the garrison.
- Help allies in need. Members with a weak territory can ask for reinforcement, and others can send squads to help them survive more waves.
- Claim your personal reward and the alliance reward when the prison event ends.
Undead Siege Rewards
There are two reward types. Personal rewards depend on the waves your territory survives, and alliance rewards depend on the total waves survived by all members. Both grow with difficulty. The tables show the smallest and the largest reward step of each level.
Personal Rewards
| Difficulty | After wave 1 | After wave 20 |
|---|---|---|
| Level 1 | 100 Alliance Coins, 4 1m Construction Speedup, 4 1m Research Speedup | 1,500 Alliance Coins, 36 1m Construction Speedup, 36 1m Research Speedup, 5 Speedup Supply |
| Level 2 | 150 Alliance Coins, 5 1m Construction Speedup, 5 1m Research Speedup | 2,000 Alliance Coins, 48 1m Construction Speedup, 48 1m Research Speedup, 5 Speedup Supply |
| Level 3 | 300 Alliance Coins, 6 1m Construction Speedup, 6 1m Research Speedup, 1 Speedup Supply | 2,500 Alliance Coins, 60 1m Construction Speedup, 60 1m Research Speedup, 7 Speedup Supply |
| Level 4 | 350 Alliance Coins, 8 1m Construction Speedup, 8 1m Research Speedup, 1 Speedup Supply | 3,000 Alliance Coins, 80 1m Construction Speedup, 80 1m Research Speedup, 7 Speedup Supply |
| Level 5 | 400 Alliance Coins, 10 1m Construction Speedup, 10 1m Research Speedup, 10 1m Training Speedup, 1 Speedup Supply | 3,500 Alliance Coins, 100 1m Construction Speedup, 100 1m Research Speedup, 100 1m Training Speedup, 7 Speedup Supply |
| Level 6 | 450 Alliance Coins, 12 1m Construction Speedup, 12 1m Research Speedup, 20 1m Training Speedup, 1 Speedup Supply | 4,000 Alliance Coins, 130 1m Construction Speedup, 130 1m Research Speedup, 200 1m Training Speedup, 7 Speedup Supply |
| Level 7 | 500 Alliance Coins, 15 1m Construction Speedup, 15 1m Research Speedup, 25 1m Training Speedup, 1 Speedup Supply | 4,750 Alliance Coins, 160 1m Construction Speedup, 160 1m Research Speedup, 240 1m Training Speedup, 7 Speedup Supply |
| Level 8 | 600 Alliance Coins, 17 1m Construction Speedup, 17 1m Research Speedup, 30 1m Training Speedup, 1 Speedup Supply | 5,500 Alliance Coins, 180 1m Construction Speedup, 180 1m Research Speedup, 300 1m Training Speedup, 7 Speedup Supply |
| Level 9 | 650 Alliance Coins, 20 1m Construction Speedup, 20 1m Research Speedup, 40 1m Training Speedup, 1 Speedup Supply | 10 Raven Essence, 6,250 Alliance Coins, 200 1m Construction Speedup, 200 1m Research Speedup, 360 1m Training Speedup, 7 Speedup Supply |
| Level 10 | 750 Alliance Coins, 24 1m Construction Speedup, 24 1m Research Speedup, 45 1m Training Speedup, 1 Speedup Supply | 15 Raven Essence, 7,000 Alliance Coins, 230 1m Construction Speedup, 230 1m Research Speedup, 400 1m Training Speedup, 7 Speedup Supply |
Alliance Rewards
| Difficulty | First tier | Top tier |
|---|---|---|
| Level 1 | 50 waves: 448K Antitoxin, 5 30K Herbs | 300 waves: 4.93M Antitoxin, 80 30K Herbs, 200 Skill Badge |
| Level 2 | 50 waves: 560K Antitoxin, 8 30K Herbs | 300 waves: 6.16M Antitoxin, 100 30K Herbs, 300 Skill Badge |
| Level 3 | 50 waves: 700K Antitoxin, 10 30K Herbs | 300 waves: 7.7M Antitoxin, 150 30K Herbs, 400 Skill Badge |
| Level 4 | 50 waves: 1.5M Antitoxin, 15 30K Herbs | 300 waves: 15.5M Antitoxin, 170 30K Herbs, 600 Skill Badge |
| Level 5 | 50 waves: 2.2M Antitoxin, 25 30K Herbs, 2 Herb Level Supply (SR) | 300 waves: 22M Antitoxin, 240 30K Herbs, 10 Herb Level Supply (SR), 800 Skill Badge |
| Level 6 | 50 waves: 2.5M Antitoxin, 30 30K Herbs, 2 Herb Level Supply (SR) | 500 waves: 28.2M Antitoxin, 285 30K Herbs, 20 Herb Level Supply (SR), 1,250 Skill Badge |
| Level 7 | 50 waves: 2.8M Antitoxin, 10 90K Herbs, 3 Herb Level Supply (SR) | 500 waves: 32M Antitoxin, 100 90K Herbs, 30 Herb Level Supply (SR), 1,500 Skill Badge |
| Level 8 | 50 waves: 3.4M Antitoxin, 15 90K Herbs, 6 Herb Level Supply (SR) | 800 waves: 37.5M Antitoxin, 115 90K Herbs, 35 Herb Level Supply (SR), 1,950 Skill Badge, 5 Resource Supply (SR) |
| Level 9 | 50 waves: 3.5M Antitoxin, 5 300K Herbs, 9 Herb Level Supply (SR), 4 Resource Supply (SR) | 800 waves: 38.8M Antitoxin, 35 300K Herbs, 46 Herb Level Supply (SR), 2,400 Skill Badge, 32 Resource Supply (SR) |
| Level 10 | 50 waves: 3.6M Antitoxin, 5 300K Herbs, 14 Herb Level Supply (SR), 7 Resource Supply (SR) | 1200 waves: 41.8M Antitoxin, 39 300K Herbs, 60 Herb Level Supply (SR), 3,000 Skill Badge, 46 Resource Supply (SR) |
Undead Siege Video
This video walks through the event from the clue stage to the last wave.
Undead Siege Mistakes
- Skipping the garrison. Without your strongest squad in defense, your territory survives fewer waves and you earn less.
- Relocating the city while the prison attacks. The game warns that this fails the event at once.
- Choosing a level that is too hard. The next level opens only after 20 members clear the one below, so a slow climb is safer than a failed run.
- Joining late. A new member is not eligible until 48 hours have passed, and a long absence of 72 hours also rules you out.
- Leaving weak members alone. Their fallen territories cut the wave total that sets the alliance reward, so send reinforcements early.
Stronger defense also helps in other alliance events. See the Cheese Trap guide for the rally event and the squads page for building lineups.
Frequently Asked Questions
What is Undead Siege in Last Asylum?
Undead Siege is a permanent alliance event. Your alliance finds a Death Prison with Falcon Quests, and then 20 waves of Blights attack the territories of the members who take part. You defend with your strongest squad, and rewards grow with the number of waves you survive. See the alliance page for how ranks work.
Who can start the event?
Only R4 and R5 members can send Falcons to find the prison and schedule the challenge. Members first collect clues by finishing Falcon Quests, and R4 or R5 members choose the difficulty before the search. After every successful event, the search goes on cooldown for 48 hours.
What do I need to take part?
Your alliance membership must be older than 48 hours, and your offline time must stay under 72 hours. Your territory level must match the chosen difficulty, and your city cannot be in a cross-server state. Level 1 needs at least Sanctuary 15. Check the Sanctuary page for the way there.
Do shields protect me from the Blights?
No. The Blights ignore shield protection, so your troops must be in place to defend. After a member territory is breached, the Blights stop targeting it for the rest of the event. Relocating your city while the prison is attacking fails the event for you.
How do I unlock higher difficulty levels?
A level opens when 20 alliance members have defended every wave of the previous level. The enemy Might grows from 2.41M at level 1 to 24.47M at level 10, so raise your defending squad with the help of the squads page.