How to Unlock All 25 Universal Tower Defense Z New Units in Update 4

The highly anticipated Update 4 has finally dropped, and the community is already calling it the biggest content patch to date. With a massive roster expansion, players are scrambling to figure out how to unlock all the Universal Tower Defense Z new units. This update introduces a staggering 25 unique characters, completely shaking up the game's meta and offering fresh strategies for tackling difficult raids.

If you want to dominate the hardest game modes, collecting these Universal Tower Defense Z new units is absolutely essential. From hidden Secret rarities to Marvel-inspired Extractions and exclusive Summer event drops, navigating this massive update can feel overwhelming. In this comprehensive guide, we will break down exactly where and how to obtain every single new character added to the game.

Tracking Down the Secret Rarity Roster

Secret units are the crown jewels of any player's inventory, and Update 4 delivers several highly sought-after characters. Based on community reports, these units require dedicated grinding across specific game modes and acts. Finding these Universal Tower Defense Z new units requires patience, as they are locked behind challenging endgame content.

For instance, Drill Hero Spiral is exclusively found in the Beast Desert. You will need to push through to Stage Act 3 and complete the final node to secure this drop. Meanwhile, Flame Captain Embers (widely recognized by the community as a Yamamoto-inspired unit) requires players to farm the final stage of the Reaper City Raid.

Here is a complete breakdown of the Secret units and where to find them:

Evolving Ice Queen Evo is a unique process. You must first pull the base character from the standard banner, then utilize specific evolution materials to achieve her White Haze form. Player experience suggests farming Rifts heavily if you are aiming for The King, as the Universal Tear can be unforgiving with its rotation schedules.

Marvel-Inspired Extraction Drops

One of the most exciting additions to the game is the Extractions game mode. This mode introduces a fresh wave of superhero-themed Universal Tower Defense Z new units that bring unique utility to your loadouts. These characters are heavily inspired by the Spider-Man and Marvel universes, offering varying drop rates that range from guaranteed freebies to tough grinds.

When running the Extractions mode, your success rate dictates which unit you pull. Spider-Man fans will be pleased to know that the base Human Spider is incredibly easy to obtain, while the Symbiotic Alien requires a bit more luck.

Check out the drop rates for the Extractions mode below:

Additionally, players can dive into the other Expedition game mode to unlock the Trickster Phantom. This mode features a generous eight-run pity system, meaning if you do not get the unit through standard RNG, you are guaranteed to unlock it after your eighth successful completion.

Unrivaled and Mythic Banner Pulls

If you have been hoarding your gems, now is the time to spend them. The standard summon area has been updated with nine new Mythic characters, alongside a ridiculously rare Unrivaled unit. Securing these Universal Tower Defense Z new units will require a mix of luck and extensive resource management.

The standout prize in the summon area is Visionary Unrivaled. While technically classified as an Unrivaled rarity, the game engine counts her toward your Mythic collection. However, be prepared for a massive grind: she boasts an incredibly low 0.005% drop rate.

Most of the standard Mythics can be pulled directly from the banner, while a select few are locked behind the Castle of Greed.

For those looking to optimize their gem spending, community reports recommend waiting for favorable banner rotations before going all-in for units like Body Captain or Corpse Maiden.

Exclusive Summer Event Units and Cosmetics

Update 4 is not just about permanent additions; it also brings a massive seasonal Summer Event. By playing the Summer Event game mode, players earn a unique seasonal currency. This currency is used to purchase Summer Capsules, which contain exclusive, limited-time Universal Tower Defense Z new units.

The two major prizes in the Summer Capsules are the duo units: Ash & Valkyrie, and Asura & Wrath. Because these are exclusive to the event, players should prioritize farming the Summer Event crates before the season ends.

Alongside the units, the update introduces a massive cosmetic overhaul. There are currently 17 new skins available, which can be equipped via the new Skin UI.

While the premium crates offer better drop rates for high-tier skins, the free-to-play route is entirely viable. However, at 15,000 gems per standard crate, you will need to farm heavily. Some dedicated players have reported spending upwards of 1.5 million gems just to secure legendary skins like the Bunny Suit for their favorite units.

Strategies for Farming the New Roster

With 25 units to collect, efficiency is key. If you want to unlock all the Universal Tower Defense Z new units without burning out, you need a structured farming routine.

Start by prioritizing the limited-time Summer Event. Since Ash & Valkyrie and Asura & Wrath will likely become unobtainable once the event concludes, funnel your daily playtime into the Summer Event game mode to stockpile capsules. Once your daily event runs are complete, pivot your focus to the Extractions mode. Because the Trickster Phantom has an eight-run pity system, it is one of the easiest high-tier units to guarantee early on.

For standard progression, ensure you are logging in daily to collect passive gems. You will need a massive stockpile to chase the 0.005% drop rate of the Visionary Unrivaled or to afford the expensive 15,000-gem skin crates. For more information on optimizing your Roblox gaming experience and securing your account while trading, check out the official Roblox safety guidelines.

Finally, coordinate with other players for the Reaper City Raid and the Hollow Destroyer vs Reapers game modes. Pushing for Flame Captain Embers and Light Prince Ascension is significantly easier when you have a coordinated team managing crowd control and boss aggro.

Frequently Asked Questions (FAQ)

How many Universal Tower Defense Z new units were added in Update 4? Update 4 introduced a total of 25 new units to the game. This includes 9 Secret units, 9 Mythic units, Marvel-inspired Extraction units, and exclusive Summer event characters.

What is the hardest unit to get in the new update? The Visionary Unrivaled is widely considered the most difficult unit to obtain. She is located in the standard summon area but features a punishingly low drop rate of just 0.005%.

Where do I find the new Spider-Man and Iron Man units? These Marvel-inspired characters are found in the Extractions game mode. The Human Spider (Spider-Man) has a 95% drop rate, Iron Billionaire (Iron Man) has a 25% drop rate, and the Symbiotic Alien (Venom) has a 15% drop rate.

Are the Universal Tower Defense Z new units from the Summer Event permanent? No, Ash & Valkyrie and Asura & Wrath are exclusive to the Summer Capsules. You must farm the Summer Event game mode to earn currency and unlock them before the seasonal event ends.