What if my in-game numbers differ from the placeholder text?

Trust your in-game values. Buffs, alliance bonuses, and event discounts can change displayed costs slightly. If you see a stable pattern that doesn't match anything here, that's the most valuable data to share back to the community.

S3 Tile Upgrades

Season 3 — Everfrost Era

Plan your Bio Lab, Smart Greenhouse and combat building progression. Strategic priorities baked in — fill cost cells as you see them in-game.

What are S3 tiles?

Season 3 (the Everfrost Era) replaces most of your seasonal buildings from Season 2. Where you used to have multiple labs and arsenals, S3 condenses them into a tighter set of buildings — but the leveling is still where most of your seasonal power comes from. There are 5 building types that matter, plus 4 copies of the Smart Greenhouse. For the full season overview, see the Season 3 wiki guide.

The two new seasonal resources

Unlike standard Last Z buildings (which eat Bread/Wood/Iron/Coin), S3 buildings consume two season-specific resources:

❄️ Frost Cores — drop from killing Snow Leopards and Frost Banes. Only the first 15–30 kills per day reward Frost Cores, so kill Banes first (they give more). Income doubles mid-season once Proliferation activates.
🌸 Ice Blooms — generated passively by your Smart Greenhouses. Higher Greenhouse level = higher output per hour, which is why most players push Greenhouses early.

How the data tables work

The exact per-level Frost Core and Ice Bloom costs aren't published anywhere public — they only exist in-game. We've started seeding the tables with values confirmed from in-game screenshots (marked with a ✓), plus each building's primary stat per level where known. Every other cell is editable: fill it as you upgrade and it saves to your browser. If you'd like to share your numbers, let us know — we'll roll community contributions into the confirmed baseline.

Recommended priority order

1 Bio Lab L1 → L28 (chase Virus Resistance for L60 NPC unlocks)
2 Smart Greenhouse — level all greenhouses evenly to ~L20 (compounds Ice Bloom income early)
3 Smart Greenhouse — push to L25–26, then stop (saturation point)
4 Icy Arsenal — leveling begins (highest combat impact, +3% Season ATK/level)
5 Icy Fort — pair-level with the Arsenal if you anchor a hive (+3% Season DEF/level)
6 Command Post — steady passive boost (+1% Season DMG/level), max L30
7 Bio Lab → push to L30 (final virus resistance gains)
8 Mop up remaining combat building levels as resources allow

🧪

Bio Lab

×1 Max L30 Priority #1

The ONLY source of Virus Resistance — gates your ability to fight Level 60 Snow Leopards & Frost Banes (the highest-glory NPCs).

Primary Stat

Virus Resistance

Strategy: Priority #1 all season. Target ~L28 before switching focus to combat buildings. Each level meaningfully raises the NPC level you can reliably kill.

Per-Level Data (editable)

0 / 90 cells filled

Row L{n} = the upgrade to L{n} (cost shown in-game on the L{n-1}→L{n} screen); the Virus Resist value is the total at L{n}. Cells marked ✓ are confirmed from in-game; the rest are yours to fill in.

Level	❄️ Frost Cores	🌸 Ice Blooms	📊 Virus Resist
L1
L2
L3
L4
L5
L6
L7
L8
L9
L10
L11
L12
L13
L14
L15
L16
L17
L18
L19
L20
L21
L22
L23✓
L24✓
L25✓
L26✓
L27
L28
L29
L30

🌿

Smart Greenhouse

×4 (5th unlocks via Wartime Investment) Max L30 Priority #2

Passively produces Ice Blooms — your main upgrade resource. Higher level = higher hourly output across all greenhouses. Upgrades are paid in Frost Cores only.

Primary Stat

Ice Bloom output / hour

Strategy: Useful to push to ~L25–26, after which Ice Bloom income saturates. Level evenly across all greenhouses. Income compounds, so early investment pays off most.

Per-Level Data (editable)

0 / 90 cells filled

Row L{n} = the upgrade to L{n} (cost shown in-game on the L{n-1}→L{n} screen); the Icebloom/h value is the total at L{n}. Cells marked ✓ are confirmed from in-game; the rest are yours to fill in.

Level	❄️ Frost Cores	🌸 Ice Blooms	📊 Icebloom/h
L1
L2
L3
L4
L5
L6
L7
L8
L9
L10
L11
L12
L13
L14
L15
L16
L17
L18
L19
L20✓
L21✓
L22✓
L23✓
L24✓
L25✓
L26✓
L27
L28
L29
L30

⚔️

Icy Arsenal

×1 Max L50 Priority #3

Boosts Season Troop ATK (Attack). Pure offensive power for seasonal combat.

Primary Stat

Season Troop ATK

Per Level

+3% per level

Strategy: Combat building — invest after Bio Lab L28 and Greenhouses L25. Highest direct impact on rallies and Yeti damage.

Per-Level Data (editable)

0 / 150 cells filled

Row L{n} = the upgrade to L{n} (cost shown in-game on the L{n-1}→L{n} screen); the Season ATK value is the total at L{n}. Cells marked ✓ are confirmed from in-game; the rest are yours to fill in.

Level	❄️ Frost Cores	🌸 Ice Blooms	📊 Season ATK
L1
L2
L3
L4
L5
L6
L7
L8
L9✓
L10
L11
L12
L13✓
L14
L15
L16✓
L17✓
L18
L19✓
L20✓
L21
L22
L23✓
L24✓
L25
L26
L27
L28
L29
L30
L31
L32
L33
L34
L35
L36
L37
L38
L39
L40
L41
L42
L43
L44
L45
L46
L47
L48
L49
L50

🛡️

Icy Fort

×1 Max L50 Priority #4

Boosts Season Troop DEF (Defence). Critical for defending against rallies on your HQ.

Primary Stat

Season Troop DEF

Per Level

+3% per level

Strategy: Defensive backbone — essential if you anchor a hive or sit near contested zones. Pair-level with the Icy Arsenal.

Per-Level Data (editable)

0 / 150 cells filled

Row L{n} = the upgrade to L{n} (cost shown in-game on the L{n-1}→L{n} screen); the Season DEF value is the total at L{n}. Cells marked ✓ are confirmed from in-game; the rest are yours to fill in.

Level	❄️ Frost Cores	🌸 Ice Blooms	📊 Season DEF
L1
L2
L3
L4
L5✓
L6
L7
L8
L9
L10
L11
L12
L13
L14
L15
L16✓
L17✓
L18
L19✓
L20✓
L21✓
L22
L23
L24
L25
L26
L27
L28
L29
L30
L31
L32
L33
L34
L35
L36
L37
L38
L39
L40
L41
L42
L43
L44
L45
L46
L47
L48
L49
L50

🎖️

Command Post

×1 Max L30 Priority #5

Boosts Season Troop DMG (Damage). Steady multiplier across all seasonal combat actions.

Primary Stat

Season Troop DMG

Per Level

+1% per level

Strategy: Smaller per-level gain than the Icy Arsenal, but a flat multiplier that scales everything. Level last among combat buildings.

Per-Level Data (editable)

0 / 90 cells filled

Row L{n} = the upgrade to L{n} (cost shown in-game on the L{n-1}→L{n} screen); the Season DMG value is the total at L{n}. Cells marked ✓ are confirmed from in-game; the rest are yours to fill in.

Level	❄️ Frost Cores	🌸 Ice Blooms	📊 Season DMG
L1
L2
L3
L4
L5
L6
L7
L8
L9
L10
L11
L12
L13✓
L14
L15
L16
L17✓
L18✓
L19✓
L20✓
L21✓
L22✓
L23
L24
L25
L26
L27
L28
L29
L30

Help build the cost data

Last Z: Survival Shooter doesn't publish per-level building costs anywhere — they only exist in-game. As you upgrade each building, your in-game UI shows the exact Frost Cores and Ice Blooms required for the next level. Type those numbers into the cells above and your progress is saved automatically.

If you'd like to share your data so other players benefit, please send a screenshot or copy of your table — we'll merge confirmed numbers into a shared baseline.

Quick FAQ

Does my data sync across devices?

No — costs are saved to your browser's localStorage only. If you clear site data or switch devices, you'll need to re-enter them. To share your tables, use the contact form linked above.

Why is the Icy Arsenal max L50 but Bio Lab only L30?

The combat buildings (Icy Arsenal and Icy Fort) cap at level 50. The Bio Lab and Command Post cap at 30. Smart Greenhouses also cap at 30 but realistically saturate around L25–26 in terms of useful Ice Bloom income.

What if my in-game numbers differ from the confirmed cells?

Trust your in-game values. Buffs, alliance bonuses, and event discounts can change displayed costs slightly. The ✓ cells are confirmed from in-game screenshots, but if you see a stable pattern that doesn't match, that's the most valuable data to share.