Last updated: July 2026
Universal Tower Defense Z Update 4.0 Units — How to Get Every New Unit
Complete Universal Tower Defense Z Update 4.0 unit guide for July 2026. Moonless Sky, Flame Captain, Drill Hero, and all Bleach expansion units.
Unit Acquisition Summary
Update 4.0 introduces six headline units across Boundless, Secret, Mythic, and Legendary rarities. Acquisition paths split between raid farms, banner summons, and multi-step evolutions. This guide maps every route so you prioritize the units that matter for your account stage.
- Moonless Sky (Boundless, Dark) — Evolve Ichiko from Hueco Castle Raid
- The Almighty King (Boundless, Dark) — Evolve The King from Moonless Sky Rift (25 pity)
- Symbiotic Alien (Apex) (Secret, Dark) — Crime Fighting Extraction (15% / 5 pity)
- Flame Captain (Secret, Fire) — Reaper City Raid Act 5 / Boss Rush
- Drill Hero (Secret, Physical) — Beast Desert Legend Act 3 (7.25% / pity 30)
- Trickster (Phantom) (Secret, Light) — Summon banner — Persona crossover
- Cat Captain → Neko Captain (Mythic, Light) — Basic/Selection Banner + Black Cat Spirit
- Bloody Captain (Mythic, Magic) — Summon banner
- Ice Queen (White Haze) (Legendary, Ice) — Evolve Rukia via Reaper City Raid Act 4
Priority Pull and Farm Order
Endgame accounts: rush Hueco Castle Raid for Ichiko → Moonless Sky first. The Boundless carry defines 4.0 meta. Mid-game: redeem UTDZApologyForBugs! for the Boundless Orb before starting evolution step two. Parallel-farm Reaper City Act 5 for Flame Captain if you lack DoT options.
Banner summoners: Cat Captain and Bloody Captain are Mythic banner units—evolution items come from Reaper City Raid Shop. F2P players can skip banner units and still clear content with Moonless Sky plus existing 3.0 S-tier roster.
Peroxide Tag Strategy
Reaper City Raid stages grant 100% bonus damage to Peroxide-tag units. Before farming Flame Captain or Almighty relics, verify which roster units carry the tag. The Almighty King, Visionary (Unrivaled), and Moonless Sky are common Peroxide carries that halve clear times.
Evolution Material Checklist
Moonless Sky needs Universal, Burning, Holy, and Phantom Fragments plus 2 Hollow Essence, 1 Boundless Orb, and 1 Moonless Blade. Flame Captain (Ember) needs Universal, Sky, and Burning Fragments plus 1 Ashen Sword from the raid shop. Ice Queen (White Haze) chains through Rukia banner pull → first evolution → Frozen Blade from Act 4.
Stock fragments from codes (WeLoveBerserker!, WeLoveUTDZ!) and Story farming before committing to multi-step evolutions.
Frequently Asked Questions
Best Update 4.0 unit?
Moonless Sky—Boundless burst DPS that tops current tier lists.
Easiest unit to get?
Drill Hero with 30-clear pity on Beast Desert Act 3.
Free Boundless Orb?
UTDZApologyForBugs! code grants one on redemption.
Cat Captain evolution item?
Black Cat Spirit from Act 3 or 600 Soul Reaper Badges in shop.
Skip banner units?
Yes for F2P—Moonless Sky and Flame Captain cover DPS needs from raids.