Update 5.5 brings the highly-anticipated Mugen Train raid to Weak Legacy 2, along with Akaza V2, new outfits, new locations, and a full drop system. This guide walks you through everything you need to know, including how to unlock V2, the best way to clear the raid, and every new reward added in this patch.
New Location: Demon Cave
This is now the main hub for Demon-based progression and V2 acquisition.
How to Access Demon Cave
• Located in the Snow Area (same region as before, but now a new cave entrance has been added).
What You Can Do Here
• Unlock Akaza’s Destructive Death V2
• Purchase the latest Demon abilities
• Exchange raid drops for upgrades
Requirements to Unlock V2
To learn Destructive Death V2, you must meet all of the following:
| Requirement | Amount |
|---|---|
| Snowflakes (from Mugen Train Raid) | 10 |
| Level | 50+ |
| Yen | 100,000 |
| Crystal Essence | 2 |
Be prepared to farm the raid for Snowflakes, as they are the main progression currency for this update.
New Raid: Mugen Train
This is the core content of Update 5.5 and where you will farm Snowflakes.
How to Enter the Raid
• Located in the Snow Area
• Ticket cost: 100,000 Yen
Raid Difficulty Options
| Mode | Recommended Team | Notes |
|---|---|---|
| Easy | 2–3 players | Low Snowflake drop rate |
| Medium | 4 players | Best balance of time vs drops |
| Hard | 4 strong players | Highest Snowflake drop rate |
Snowflakes drop on all difficulties, but Medium and Hard are the most efficient.
Mugen Train Raid – Full Breakdown
Phase Flow Overview
- Clear demons and fleshy obstacles inside the train
- Fight Emu
- Fight Akaza in a 2-phase battle
Boss Mechanics Summary
Emu Fight
• Causes sleep often – stay ready to break out quickly
• Falling off the map triggers Inosuke to save you
• On Easy mode, healing is available between phases; harder modes remove this safety
Akaza Fight (2 Phases)
Phase 1:
• Focus on dodging combos and hit only during his recovery windows
• Avoid getting caught in chained attacks
Phase 2 (Awakened):
• Akaza evolves mid-fight
• Includes clashes, awakening sequences, and higher-damage combos
• Very limited punish windows – patience is key
How to Unlock Akaza V2 + Ultimate Move
Step 1: Unlock V2 in Demon Cave
(Meet the requirements listed earlier)
Step 2: Get the Ultimate (Last Move)
• Raise Akaza to 250 Mastery
• Defeat Awakened Akaza for a chance at the ultimate move
• Spawn Location: Near Giyu
• Drop Rate: 54%
The ultimate is strong but has a short hit window. It is most reliable when comboed from the air.
All New Outfits & Their Stats
These outfits provide significant buffs and are obtainable through chests and drops.
| Outfit | Rarity | Key Bonuses |
|---|---|---|
| Akaza Outfit | Mythic | Strength +30, Damage to Destructive Death +10%, Speed +2, Damage Reduction +5%, Durability +1,700, Drop Rate +2% |
| Flame Outfit | Mythic | Strength +25, Damage to Flame Breathing +10%, Speed +3, Damage Reduction +3%, Durability +1,700, Drop Rate +6% |
| Dream Outfit | Mythic | Strength +15, Damage to Dream Manipulation +10%, Speed +2, Damage Reduction +3%, Durability +1,700, Drop Rate +6% |
| Boar Mask | Legendary | Strength +15, Speed +1, Damage Reduction +2%, Durability +600 |
The Mythic outfits are extremely valuable for their durability and drop rate bonuses on top of combat power.
New Feature: Gifting System
Players can now gift Game Passes to each other.
To Gift:
• Open Game Pass shop
• Select a pass
• Choose “Gift” and enter the player’s username
This feature makes progression more accessible and community-driven, especially for clans or friends supporting each other.