Whiteout Survival Fire Crystal building costs for the Embassy, Infirmary, Command Center, troop camps and War Academy

Taking the Embassy from level 1 to FC10 takes about 601 days of build time, 5.5 times the Command Center's 109, though it costs the least Meat of the five. Otherwise the ladders share one shape: the Embassy, Infirmary, Command Center and troop camps each spend 23.6% of their time reaching level 30 and 29.1% from 30 to FC5, leaving almost half for FC5 to FC10.

All times are base build time, before any Construction Speed bonus.

The five ladders side by side

The three troop camps share one ladder, so the row is for one camp: all three together take about 410 days, 15,645 Fire Crystal and 1,146 Refined Fire Crystal, more than any single building. The War Academy only exists from FC1, yet its steps ask for the most Meat, 2.41B, because every one of them is a Fire Crystal step. The Infirmary and the Command Center need exactly the same Fire Crystal, 2,314, and Refined Fire Crystal, 174.

Wood matches Meat on every step from level 11, Coal runs at about a fifth of it and Iron at about a twentieth. Levels 1 to 10 cost no Meat, and no step costs Steel.

Stages

FC5 to FC10 takes 1.62 times as long as 30 to FC5 on every ladder except the War Academy's, where it is 1.87. Fire Crystal is split close to evenly on either side of FC5; Refined Fire Crystal appears only after it.

Level 30 is the longest single step on every ladder that has one: about 27 days for the Embassy, 6 for a troop camp or the Infirmary and 5 for the Command Center. The first step past it is far shorter, about 5 days for the Embassy and one for a camp.

What each step needs

Every upgrade needs the Furnace at the same level, and each Fire Crystal step needs the Furnace one level ahead: FC1-1 needs Furnace FC2, so these buildings always trail it. The Command Center also needs the Embassy at its own level on every step. The Furnace in turn needs the Embassy at the previous level from level 11 on (Furnace upgrade costs), so the Embassy, the slowest ladder here, sits on the Furnace's path.

Fire Crystal per step

Within each band of five Fire Crystal steps the cost repeats. Through FC5 the four sub-levels and the main level cost the same. After FC5 the main level costs half the Fire Crystal and more Refined Fire Crystal than its sub-levels: a troop camp's FC5-1 costs 90 Fire Crystal and 4 Refined, its FC6 step 45 and 9, and its FC10 step 78 and 63. The troop camps and the War Academy pay the same Fire Crystal and Refined Fire Crystal on every step from FC1-1.

The band from FC8-1 to FC9 is shorter than the bands on either side on every ladder: about 9 days a step for the Embassy against 13 before and after, and 2 for a camp against 3.

Level by level

Embassy

Infirmary

Command Center

Infantry, Lancer and Marksman Camps

The table follows the Infantry Camp. The Lancer and Marksman Camps open later, at Furnace 9 and 8, and their first levels wait on those Furnace levels; their level 1 also costs 95 Wood where the Infantry Camp's is free. Every other cost and time is the same.

War Academy

The War Academy's FC1 row lists no cost; its costs start with FC1-1.