Universal Tower Defense Update 0.5 Guide – New Units, Raids, Codes & Systems Explained

Universal Tower Defense Update 0.5, titled “Hollowed Eclipse”, is one of the biggest updates the game has received so far. This patch adds brand-new endgame content, multiple powerful units, new relic systems, and major quality-of-life improvements that change how progression works. If you want to understand what to grind, what to prioritize, and how this update affects the meta, this guide breaks everything down clearly.

New Gamemodes in Update 0.5

Raids (New Endgame Mode)

Raids are the main highlight of Update 0.5. This is a high-difficulty endgame mode where players fight strong bosses while climbing Hueco Fortress. Each successful run rewards you with special raid currency.

You can spend raid currency in the Raid Shop to obtain:

• Rerolls
• A brand-new exclusive unit
• High-value progression items

New Raid Map: Top of Hueco Castle

This map takes place at night in a ruined castle filled with powerful spirits. Bosses here are significantly stronger than standard content, but the rewards scale accordingly, making this mode essential for late-game players.

Boss Rush Mode

Boss Rush is a single-stage challenge where you face multiple hard bosses back-to-back. There are no breaks or easy waves, making it one of the hardest modes currently available. If your team can clear it, the rewards are among the best in the game.

New Systems and Quality of Life Features

Update 0.5 introduces several systems that reduce grind and improve unit management:

• Shiny Transfer – Move shiny status between units
• Shiny Normalization – Convert extra shiny units into rerolls
• Relic Merchant & Relic Dust – Sell relics to get dust for upgrades
• Etherealization Shards – Etherealize units without pulling duplicates
• Stat Transfer – Move stats between units
• Music Sets – Customize lobby music
• Global Matchmaking – Faster and easier matchmaking worldwide

These changes make progression smoother, especially for long-term players.

All New Units in Update 0.5

New Units (Normal)

• Mythic: Koyote
• Mythic: Ultiorra
• Mythic: Tierabel
• Mythic: Nellee
• Exclusive: Grommjaw
• Secret: Ichiko

New Shiny Units

• Shiny Mythic: Koyote
• Shiny Mythic: Ultiorra
• Shiny Mythic: Tierabel
• Shiny Mythic: Nellee
• Shiny Exclusive: Grommjaw
• Shiny Secret: Jinoo
• Shiny Secret: Dragon Guy
• Shiny Secret: Ichiko

New Evolved Units

• Koyote (Number One)
• Ultiorra (Oblivion)
• Tierabel (Hydro)
• Nellel (Primal)
• Grommjaw (Panther)
• Ichiko (Rage)

These evolved units are designed for endgame content and pair extremely well with the new relic tag system.

New Relic Sets and Tag Perks System

Relics now come with Tag Perks, which grant bonuses if your unit matches specific tags. If a unit matches all listed tags, it receives every perk.

Relics from Raids can also roll star ratings, boosting their stats beyond normal mythic values.

Shadow Reaper Relic Set

• Full Set Bonus: Cooldown reduction and range increase
• Tag perks include bonuses for Peroxide, Reaper, Rage, and Hollow units, focusing on cooldown, crit, elemental damage, and armor penetration.

Reaper Relic Set

• Full Set Bonus: Damage, range, crit rate, and crit damage
• Tag perks heavily reward crit builds, range scaling, and hyper armor damage.

These relics significantly affect unit builds and the overall meta.

Trait Rebalance Overview

• Eternal (Buffed)
  Reduced cooldown and scaling damage/range per wave, up to massive late-game bonuses.
• Astral (Reworked)
  Now focuses on affliction duration, cooldown reduction, and stacking DOT effects. Placement limits were removed, making it useful for more units instead of just a few top-tier ones.

Etherealization Shards Explained

Etherealization Shards allow you to etherealize units without pulling the same unit multiple times. To obtain shards:

• Sacrifice a unit of the same rarity
• Pay a large amount of in-game currency

Shard types:

• Mythic Etherealization Shard
• Secret Etherealization Shard
• Exclusive Etherealization Shard

This system greatly reduces RNG frustration.

New Shop Bundles

All old bundles are removed and replaced with new ones:

• 79 Robux – Urohoro Bundle Stat Locks, rerolls, gold, and fragments
• 999 Robux – Substitute Reaper Bundle Gems, gold, rerolls
• 4,999 Robux – Hollow Bundle Includes emotes, large gem and gold rewards, and rerolls
• 9,999 Robux – Soul Captain Bundle High-end bundle with massive resources, lucky potions, and exclusive cosmetics

Other Notable Additions

• Relic Dust from selling relics
• 6 new evolution items
• Spirit Tokens for progression

Universal Tower Defense Update 0.5 Codes?

• PeroxideUpd! – 25 Trait Rerolls, 2500 Gems, 10000 Gold, 15 Level Requirement (6 Days)
• SmallGift – 10 Trait Rerolls, 1000 Gems (5 Days)
• Update 0.5 – 25 Trait Rerolls, 5000 Gems, 5 Level Requirement 10 Days)
• NewYear26! – 50 Trait Rerolls, 30 Stat Rerolls, 15 Locks, 50 Level Requirement (10 Days)
• InterestedIn0.5! – 25 Trait Rerolls, 15 Level Requirement (5 Days)

Also check out our Universal Tower Defense Codes for more rewards!

Universal Tower Defense Update 0.5 completely changes the late-game experience. Raids, Boss Rush, evolved units, and the new relic tag system push players toward smarter team building instead of pure luck.

Combined with strong quality-of-life features like Etherealization Shards and stat transfers, this update makes grinding more rewarding and less frustrating. If you are serious about endgame progression, focusing on Raids, relic farming, and evolved units should be your top priority in Update 0.5.