Last Z Season 2 Winter / Everfrost Guide
Tables: 3
Updated 10/12/2026
| New S2 element | What it does | Early rule |
|---|---|---|
| Captured city reset | Previous city ownership no longer gives your alliance the same map position | Wait for the alliance city route before attacking or moving |
| Smart Greenhouse | Produces Ice Blooms for the seasonal upgrade engine | Establish Ice Bloom production with Smart Greenhouses |
| Bio Lab | Main resistance building and core seasonal progression gate | Keep it upgrading whenever your Ice Bloom / Frost Core supply allows |
| Frost Cores | Upgrade-gating resource for seasonal progress | Reserve them for the Bio Lab level needed by your Mastery path |
| Frostbanes | Core seasonal farming targets for Frost Cores and influence-style progress | Prioritize them before lower-value seasonal kills when attempts or fuel are limited |
| Snow Leopards | Seasonal creature targets tied to resistance thresholds and first-clear value | Push higher levels only when resistance allows; do not waste attempts on bad value |
| Yetis | Limited-attempt seasonal targets with valuable rewards | Coordinate rallies and do not miss daily attempts |
| Your situation | Next move | Why |
|---|---|---|
| Starting Winter | Build Smart Greenhouses and develop Bio Lab. | Greenhouses supply Ice Blooms; Bio Lab raises Virus Resistance. |
| A small Ice Bloom shortfall blocks Bio Lab | Save current production. Upgrade a Greenhouse only if its extra output repays the cost by the time you need the Bio Lab level. | An upgrade that pays back too late delays your lab goal. |
| Working toward level 60 Frostbanes before switching to Combat | Prioritize Bio Lab 26. | Level 26 gives that access before the Combat switch. |
| Ready to switch to Combat and keep level 60 Frostbane access | Reach Bio Lab 28 before switching. | The pre-Combat level 26 checkpoint does not preserve that access after the switch. |
| Your farming checkpoint is secured and you are developing combat buildings | Prioritize Command Post; compare cheaper Icy Arsenal or Icy Fort levels when the next Command Post level is disproportionately expensive. | Command Post adds Season Troop DMG; Arsenal and Fort add Season Troop ATK and DEF. |
| Building | Main value | Mistake to avoid |
|---|---|---|
| Smart Greenhouse | Ice Bloom production for Bio Lab upgrades | Upgrading a Greenhouse when its extra production will not repay the cost by the time you need the Bio Lab level |
| Bio Lab | Major resistance progression and seasonal unlock tempo | Spending Frost Cores elsewhere and letting Bio Lab sit idle |