Universal Tower Defense Z Symbiotic Alien (Venom) — How to Get

Unit Overview

Symbiotic Alien (Apex)—the Venom-inspired Secret Dark unit—is exclusive to Crime Fighting Extraction in Update 4.0. It fills a high-damage hybrid role with Biomass interactions that boost dark-focused teams. No shop or banner path exists; extraction farming is the only legitimate method.

Drop rate is approximately 15% per successful extraction with pity near 5 clears. Budget multiple runs—first-clear luck is possible but uncommon.

Step-by-Step Farm Route

Step 1: Queue Crime Fighting Extraction from lobby (not other extraction modes). Step 2: Clear red exclamation World Events while grinding toward 300 total enemy kills. Step 3: Defeat the red skull boss that spawns at 300 kills. Step 4: Walk to the extraction point and wait for the extraction window—rewards only claim after extraction completes.

• Join Crime Fighting Extraction specifically
• Farm 300 enemy kills across the map
• Defeat red skull boss at kill milestone
• Extract within the 5-minute window
• Repeat until Symbiotic Alien drops (~15% rate)

Team and Trait Tips

Stack dark synergies with Moonless Sky or The Almighty King for boss burst. Virtual Idol extends run survivability. Ruler trait on Symbiotic Alien maximizes the hybrid DPS ceiling once obtained.

Do not disconnect after the boss dies—extraction is mandatory. Losing a 30-minute run to a early disconnect is the most common farm mistake.