Quick Answer
Use this guide for formation planning, strategy execution, and reward tracking. Check the Wandering Merchant and Lost Ruins event page for the full event context.
Killer Machine Army Raid at a Glance
Event type
Multiplayer raid operation
Difficulties
Casual (any level) / Challenge (Lv. 45+ required)
Boss weakness
Ice preferred; also weak to Lightning
Boss family
Machine family
Key mechanic
360-degree laser (ice pillar cover), high enemy density
Event deadline
Through July 21, 2026 11:59
Activity Overview
The Killer Machine Army Raid is a time-limited multiplayer quest added to the Wandering Merchant and Lost Ruins event. Players team up to survive waves of machine enemies and defeat the Killer Machine boss. The raid has two difficulty modes.
| Difficulty | Requirement | Purpose |
|---|---|---|
| Casual | No strict requirement | Learn mechanics, practice positioning, farm rewards at any level |
| Challenge | Lv. 45+ required | Higher enemy damage and survival pressure; intended for stronger teams |
If you are below Lv. 45, run Casual to learn the wave order and boss attack timing before attempting Challenge. The memory drop rate appears to be the same across both difficulties, but verify in-game. Casual is the efficient farm path for lower-level accounts.
Unlock and Access
The Killer Machine Army Raid is available from the event menu and multiplayer menu during the event period. Access it after completing the event story prerequisites. The event runs from June 9, 2026 12:00 through July 21, 2026 11:59 JST.
Boss / Enemy Profile
The Killer Machine boss belongs to the Machine family and has clear elemental weaknesses.
| Attribute | Detail |
|---|---|
| Preferred weakness | Ice |
| Secondary weakness | Lightning |
| Boss family | Machine |
| Key threats | 360-degree laser, high-density enemy waves |
| Add spawns | Slime Borg, Killer Machine, various machine enemies |
Ice damage dealers get the largest damage bonus and should be the core of your damage plan. Lightning is a viable alternative if your ice options are underleveled.
Recommended Formation and Weapons
Three formation options cover different account states and weapon availability.
Option A: Blue Steel Machine Lance Stack
| Slot | Role | Weapon |
|---|---|---|
| Carry 1 | Ice physical DPS | Blue Steel Machine Lance |
| Carry 2 | Ice physical DPS | Blue Steel Machine Lance |
| Carry 3 | Ice physical DPS | Blue Steel Machine Lance |
| Support | Healing or buffs | Ice Staff or support weapon |
A full team of four Blue Steel Machine Lances is the strongest setup for this raid. Coordinate with friends or a fixed group if possible.
Option B: Ice Magic Focus
| Slot | Role | Weapon |
|---|---|---|
| Main carry | Ice magic DPS | Ice Staff |
| Sub DPS | Ice or lightning backup | Ice Staff or elemental alternative |
| Support | Healing and sustain | Support staff or priest weapon |
| Utility | Sub weapon flex | Crystal Claw or Metal Wing |
This is the recommended setup if you do not have Blue Steel Machine Lance. Ice Staff provides reliable ice magic damage from range, which helps with positioning around ice pillars.
Option C: Budget / Early Account
| Slot | Role | Notes |
|---|---|---|
| Carry | Best ice or lightning weapon available | Use highest-levelled elemental weapon |
| Healer | Any weapon with group healing | Prioritize HP recovery over damage |
| DPS | Second-best elemental weapon | Fill weakness if possible |
| Utility | Sub weapon for utility | Crystal Claw or Metal Wing if owned |
Run this on Casual difficulty until your levels and weapons improve. Focus on learning wave patterns and boss attack timing rather than forcing Challenge with underleveled gear.
Sub Weapon Recommendations
- Crystal Claw — strong sub weapon for this raid.
- Metal Wing — another strong sub weapon option.
Vocation and Skill Recommendations
| Role | Vocation | Notes |
|---|---|---|
| Lance DPS | Warrior | Matches Blue Steel Machine Lance |
| Magic DPS | Mage | Faster special rotation |
| Sustain | Priest | HP regeneration for team survival |
Recommended adventure skills include Booming Bog (slow) and Arrow skills. Healing and sustain skills are also valuable given the high enemy density and chip damage pressure.
Memory and Armor Recommendations
- Ice Golem Memory
- Ice Earring
- Big Hammer Memory
- Mini Demon Memory
- Killer Machine Series armor (matched to weapon)
- Archmage Series armor (matched to weapon)
Strategy Points
Four mechanics determine success or failure in this raid. Handle them in this priority order.
1. Survive the Waves (Avoid Damage Over Rushing)
The raid throws a large number of enemies at your team. Do not rush in blindly. Focus on avoiding damage, clearing adds safely, and preserving HP for the boss wave. Sustained chip damage from multiple enemies adds up quickly if you ignore positioning.
2. Wave 3: Slime Borg Balls and Killer Machine Arrows
Wave 3 introduces Slime Borg balls and Killer Machine arrows. Both are difficult to dodge. Stay mobile, watch the projectile paths, and prioritize clearing the shooters before they overwhelm the arena with ranged attacks. This is the most dangerous wave before the boss.
3. Boss 360-Degree Laser (Ice Pillar Cover)
The Killer Machine boss fires a 360-degree laser that deals massive damage. At roughly 50% HP, this attack can one-shot players. The boss creates ice pillars during the fight. Hide behind these pillars to block the laser completely. Learn the pillar spawn positions and plan your movement so you are never caught in the open when the laser charges.
4. Special and Skill Rotation
Mage vocation accelerates special skill rotation, which helps burn down the boss faster during safe windows. Warrior with Lance provides strong physical ice damage. Priest keeps the team alive through the high chip damage. Coordinate specials to clear dense add waves and to push the boss during pillar-stun windows.
Rewards
| Reward | Detail |
|---|---|
| Killer Machine Army Memory | Red Memory from the raid |
| Gems | From cumulative point milestones |
| Gacha tickets | From cumulative point milestones |
| Killer Machine Army Memory (Rank B) | From cumulative point milestones |
| Metal ticket | From cumulative point milestones |
| Metal Brothers ticket | From cumulative point milestones |
| Liquid Metal ticket | From cumulative point milestones |
| Acceleration energy | From cumulative point milestones |
| Memory sensor | From cumulative point milestones |
| Lucky compass | From cumulative point milestones |
The Killer Machine Army Memory is the standout reward for endgame accounts. Exact ticket and material counts come from fixed event milestone tracks. Check the live reward screen in your client for the full breakdown.
Related Reads
| Page | Use it for |
|---|---|
| Wandering Merchant and Lost Ruins | Full event context and other available quests |
| Blue Steel Machine Lance | Top-tier weapon data and upgrade path |
| Ice Staff | Recommended ice magic weapon for non-Lance players |
| Crystal Claw | Sub weapon data and fit |
| Metal Wing | Sub weapon data and fit |
| Killer Machine Gacha Picks Guide | Banner weapon priority and pull recommendations |
| Current Banner | Today’s banner and pull recommendations |
| Co-op Mode Guide | General multiplayer tips and etiquette |
FAQ
What level do I need for the Challenge difficulty?
Challenge difficulty requires Lv. 45 to enter. If you are below this, farm Casual for rewards and practice.
Which weapon is best for this raid?
Blue Steel Machine Lance is the strongest choice. If you do not have it, Ice Staff is the recommended main weapon. Crystal Claw and Metal Wing are strong sub weapons.
Does the memory drop rate differ between difficulties?
The memory drop rate appears to be the same across difficulties, but verify in-game. Farm Casual if you are under Lv. 45 or prefer faster clears.
How do I survive the boss 360-degree laser?
The boss creates ice pillars during the fight. Hide behind them to block the laser. The laser can one-shot players at roughly 50% HP, so positioning is critical.
What vocation should I bring?
Warrior for Lance users, Mage for faster special rotation, or Priest for HP regeneration. Match your vocation to your weapon and team needs.