Last updated: July 2026
Universal Tower Defense Z Beast Desert Legend Guide
Universal Tower Defense Z Beast Desert Legend guide for July 2026. Farm Drill Hero from Act 3 with pity mechanics.
Stage Unlock
Beast Desert Legend unlocks after completing every chapter of Beast Desert Story mode. Act 3 is the farm target for Drill Hero—a Secret-rarity unit modeled after Simon from Gurren Lagann that summons a Drill Mech instead of attacking directly.
The same Act 3 also drops Unrivaled Fragments for Visionary evolution and Starry Glasses for Drill Hero (Spiral) evolution, making it a high-value repeat farm.
Drill Hero Drop Rates
Each Act 3 clear grants a 7.25% chance to drop Drill Hero. A pity counter guarantees the unit at 30 completions—track your runs to avoid overshooting. Starry Glasses (evolution item) drops at 14.5% with pity at 15 clears, so you can often farm both unit and evo item in the same session.
Drill Hero never deals direct damage. Deploying it summons a Drill Mech on the nearest path—click the mech to view its stats and Spiral Core passive.
Drill Hero (Spiral) Evolution
Evolve Drill Hero into Drill Hero (Spiral) via the Evolution menu once you own Starry Glasses and standard fragment requirements. Spiral Core passive keeps the summon-focused playstyle while boosting mech damage output.
Drill Hero fills a niche summon slot—pair with ground control and Virtual Idol. It is not S-tier generalist DPS but offers unique path coverage for Beast Desert challenge modifiers.
Frequently Asked Questions
How to unlock Beast Desert Legend?
Complete all Beast Desert Story chapters first.
Drill Hero drop rate?
7.25% per Act 3 clear, guaranteed at 30 completions.
Starry Glasses pity?
15 Act 3 clears guarantee the evolution item.
Does Drill Hero attack?
No—it summons a Drill Mech that deals damage on the path.
Worth farming before Moonless Sky?
Farm codes and Hueco Castle first; Drill Hero is a side-grade Secret unit.