Last Z Season 2 Bio Lab Guide
Tables: 2
Updated 10/12/2026
| Your situation | Next spend | Reason / limit |
|---|---|---|
| Below your Bio Lab 26 / 28 checkpoint, with both resources available | Upgrade Bio Lab | This funds level 60 Frostbane access for your Mastery path. |
| Short of Ice Blooms for that checkpoint | For a small shortfall, save the output from your current Greenhouses. | Upgrade a Greenhouse only if its extra production will repay the upgrade cost by the time you need the Bio Lab level; otherwise the upgrade delays that level. |
| Short of Frost Cores | Use remaining Frostbane reward attempts and scheduled alliance rallies | A Greenhouse upgrade produces Ice Blooms and cannot fill the Frost Core gap. |
| At the Bio Lab checkpoint for your Mastery path | Start Command Post; compare the next Arsenal and Fort costs | You can invest in seasonal fighting without delaying that resistance checkpoint. |
| Building | Base F2P cap | Per-level value | Value at base cap |
|---|---|---|---|
| Command Post | 30 | +1% Season Troop DMG | +30% Season Troop DMG |
| Icy Arsenal | 50 | +3% Season Troop ATK | +150% Season Troop ATK |
| Icy Fort | 50 | +3% Season Troop DEF | +150% Season Troop DEF |