Earn Investigation License experience through Hollow Zero clears, then claim unlocked License rewards.
PC / Global English live service; console/mobile availability varies by region
WHERE & HOW TO FARM
Where to farm
Hollow Zero mode menu; choose an unlocked exploration zone and access the Investigation License reward track.
Hollow Zero zone clears grant Investigation License experience, including on replay. Select an unlocked zone your team can complete, finish it, then visit the License reward track and collect unlocked milestones. The route remains useful while you have unclaimed progression, but the License’s reward limits and current interface determine how much remains to earn.
Unlock Hollow Zero at Inter-Knot Level 25, after Certified Proxy promotion and Side Mission The Zero Zone.
Have an unlocked zone available to run.
Check current License progress and unclaimed rewards.
Open Hollow Zero and inspect your Investigation License progress.
Choose an unlocked exploration zone that your current team can clear reliably.
Complete the zone through its encounters and final objective.
Return to the License screen and check whether experience advanced the track.
Claim every reward milestone now available.
Review current progress and any remaining weekly limit shown by the interface.
Run another zone if License progress and desired rewards remain.
Farming tips
A reliable clear is practical when the goal is License progress; a difficult zone is unnecessary unless its other rewards matter to you.
Replays can still grant License experience, so check the License track after a repeat run.
Repeat, collect and use
Hollow Zero runs can be repeated and grant Investigation License experience, but License progression is subject to its current reward limits. Repeat while useful progress remains; claim milestones as they unlock.
Common mistakes
Assuming a run’s rewards are claimed automatically; open the License track and collect them.
Stopping after one clear when License experience remains available; verify progress before switching modes.
Treating this as a Battery Charge material stage; Hollow Zero is a separate exploration mode.
When to stop or switch
Stop when the desired License rewards are claimed or the current progress limit is reached; switch to other Hollow Zero objectives if available.
