Frostline

Troop Tiers & Promotion

From T1 recruits to T12 Exalted: what unlocks each tier, how promotion works, and how much each tier is worth in events.

TL;DR Raise each camp separately to unlock tiers, promote old troops instead of retraining (you only pay the difference), and time big training batches to land on event days.

Tiers
T1 – T12
T10
Camp level 30
T11 Helios
War Academy (FC5)
T12 Exalted
War Academy FC10

How each tier unlocks

TierUnlockNotes
T1 – T4Early camp levelsEach camp (Infantry, Lancer, Marksman) is upgraded separately.
T5Camp 13Troop promotion also opens here.
T7Camp 19A troop passive skill unlocks at T7.
T8Camp 22
T9Camp 26Needs Furnace 26+, since no building can exceed the Furnace.
T10Camp 30
FC1 – FC10Camp Fire Crystal levels (after Furnace 30)Troops upgrade automatically as the camp’s FC level rises. Passive skills at FC3, FC5, FC8 and FC10.
T11 HeliosWar Academy researchNeeds FC5 and Furnace 30. Researched separately per troop type with Fire Crystal Shards.
T12 ExaltedWar Academy FC10 + Exalted researchNeeds that troop type’s T11 Helios unlocked first. Added April 2026.

The camp levels for T5–T10 come from one community guide (Infantry Camp); verify in-game. The War Academy appears around server day 220.

Promotion

  • Promoting a troop to a higher tier costs only the difference between the two tiers, in both resources and time. Your old investment isn’t wasted.
  • Promote your low tiers as soon as you unlock a new one, rather than keeping a mixed army.
  • On SvS Hero Development day, promotion scores better than training new troops, so save promotions for it.

Event points per troop trained

TierHall of ChiefsSvSKing of Icefield
T65951811
T78302516
T81,1303523
T91,4854530
T101,9606039
T112,5207549
T122,9579457

From one community wiki (WoS Tools). Lower tiers score far less (T1 is 90 / 3 / 1).

Helios and T12 research

  • Helios research has separate Infantry, Lancer and Marksman paths. Progress in one doesn’t unlock the others.
  • It’s paid in Fire Crystal Shards. One tracker lists an exchange rate of 13 shards per 10 Fire Crystals with a 2,600-per-day personal cap.
  • Exalted (T12) research adds +3% to a stat per level, plus a track for +600 deployment capacity per level.
  • Molten research needs War Academy FC10 and only strengthens T12 troops further. It’s the slowest part of the tree.

Related:📐 Formations by Situation🔥 Furnace & City🌍 State vs State (SvS)