Field manual · September 9, 2026
Castle Busters Best Build: 8-Unit Loadout Guide
Build inside the eight-unit cap, cover damage and placement needs, then test one slot at a time instead of copying an unsupported team.
A Castle Busters loadout supports up to eight distinct units. Patch 1.16 lists Sir Rally as free at Arena 7, Leif as free at Arena 25, and Wolfie as Battle Pass exclusive. Their skill conditions differ; these names and access labels do not establish a tested eight-unit team.
Field order
Start with the unit limit
The official game description allows up to eight distinct units in a loadout. That limit does not prescribe eight particular names or a fixed number of units in each role.
Use the access labels below to distinguish the published requirements before treating a named hero as an available option. They describe the cited release or unit page, not the contents of your account.
Field order
Compare the access conditions
The Arena and Battle Pass entries come from patch 1.16. Bishop and Fairy’s premium labels come from the undated official unit descriptions; neither label supplies a purchase price.
| Unit | Listed access | Context |
|---|---|---|
| Sir Rally | Free at Arena 7 | Patch 1.16; reaching the listed Arena is not proof that the hero is already owned. |
| Leif | Free at Arena 25 | Patch 1.16; not a free Arena 7 starter. |
| Wolfie | Battle Pass exclusive | Patch 1.16; current-season and later acquisition are not specified here. |
| Bishop | Premium | Undated official description; no price or exact unlock stated. |
| Fairy | Premium | Undated official description; no price or exact unlock stated. |
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Keep the skill requirement with the choice
Choosing a hero does not by itself show that its skill condition is met. For Leif, keep both parts together: fallen allies in his row and an enemy kill by Leif.
Sir Rally also received a cast delay in patch 1.17. The delay is part of the later note; its duration is not specified.
| Hero | Condition to account for | Described result |
|---|---|---|
| Sir Rally | Allied heroes immediately around him | Their damage increases. |
| Leif | Fallen allies in his row, followed by Leif killing an enemy unit | Those allies revive. |
| Wolfie | A neighboring ally dies | Wolfie transforms and gains attack strength. |
Field order
Continue with the individual unit or formation rule
The unit reference lists eight named attacks and skills, and the formation guide explains the three position-sensitive conditions. This page provides the capacity and conditions for comparing options; it does not supply a tested eight-unit team or named replacement chain.
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