Monster Super League: Zephyros's Secret Lab Event Guide

In Monster Super League, Zephyros's Secret Lab is a limited-time research event where progress is driven by standard Energy expenditure rather than an isolated, separate stamina pool. Clearing all research tiers requires spending Energy on high-yield Story and Dungeon stages, completing daily reset tasks, and redeeming cumulative milestone rewards before the event period ends.

How the Secret Lab Event Works

Zephyros's Secret Lab converts regular gameplay actions across the Airship and World Map into event research progress:

• Daily Experiment Tasks: These refresh every 24 hours and reward routine activities—such as stage clears and Astromon captures—with bonus Energy, Gold, and research catalysts. Skipping daily resets increases the total Energy required in the final days of the event.
• Cumulative Progress Milestones: This track tallies lifetime event contributions to unlock higher-tier summon materials and rare items.
• Shared Stamina: Because the event tracks standard Energy usage across existing story and dungeon content, progress occurs alongside regular account farming.

Optimal Energy Spending and Stage Selection

To earn research points without draining resources, direct daily Energy into stages that provide clear secondary benefits, such as gold generation or evolution materials.

Golem Dungeons B8 and B10 offer the strongest long-term return during the event. Selling high-grade Gems yields the Gold needed to fuel the Astrochip cycle: buying chips, catching wild Astromons, earning Astrogems from evolution collection rewards, and converting those gems back into Energy refills. When specific event tasks require raw stage clear counts or Astromon captures, switch to Normal difficulty Story stages to cycle runs quickly.

Beating Dark Shiva Challenge Encounters

Certain trials feature Dark Shiva, a dark-element Nat5 Astromon with high base survivability and aggressive passive skills. Brute-force damage squads frequently fail against his bulk and sustained counterattacks.

To defeat Dark Shiva in event-linked encounters:

1. Apply Crowd Control: Bring Astromons equipped with reliable Stun, Taunt, or Petrification to interrupt his active skills.
2. Weaken Defenses: Apply consistent Defense Down debuffs to cut through his high defensive pool.
3. Bring Sustain: Use passive healers and Shield generators to absorb incoming counterattacks across extended turns.
4. Avoid Panic Spending: Do not burn Astrogems on low-probability drop mechanics; focus on meeting fixed stage-clear requirements to claim guaranteed rewards.

Milestone Reward Priorities

Claim event rewards progressively rather than saving all points for the final day, which risks loss from unexpected maintenance cutoffs. Spend research points in the following order:

1. Holy Gleems and Skill Books: Universal evolution materials for Nat5 Astromons cannot be farmed in standard stages and provide the highest long-term account value.
2. High Secret and Light/Dark (L/D) Summon Eggs: These offer rare opportunities to recruit limited Light and Dark Nat4 and Nat5 Astromons.
3. Super Stone Crafting Materials: These cut down the time required to Super Evolve frontline units.
4. Energy Packs and Gold Stashes: Redeem these as needed to immediately reinvest stamina into continued dungeon and story runs.

Common Resource Mistakes to Avoid

• Rushing Premium Refills: Avoid spending Astrogems on Energy packs before collecting free daily sources, including Airship ad rewards, Astromon greeting gifts, and regular quest hand-ins.
• Running Auto-Battle with Empty Astrochips: Auto-battling Story stages without checking Astrochip inventory causes wild variants and rare encounters to pass uncaptured, forfeiting task points. Ensure Astrochip reserves are filled and auto-capture settings are active before starting story loops.