Vault of Ashes
| Conflux buildings | |||||||||||
| Halls | |||||||||||
| Village Hall | |||||||||||
| Town Hall | |||||||||||
| City Hall | |||||||||||
| Capitol | |||||||||||
| Fortifications | |||||||||||
| Fort | |||||||||||
| Citadel | |||||||||||
| Castle | |||||||||||
| Common | |||||||||||
| Blacksmith | |||||||||||
| Mage Guild | |||||||||||
| Marketplace | |||||||||||
| Resource Silo | |||||||||||
| Tavern | |||||||||||
| Specific | |||||||||||
| Magic University | |||||||||||
| Artifact Merchants | |||||||||||
| Garden of Life | |||||||||||
| Shipyard | |||||||||||
| Aurora Borealis | |||||||||||
Vault of Ashes 
| |||||||||||
| Dwellings | |||||||||||
| Magic Lantern | |||||||||||
| Altar of Air | |||||||||||
| Altar of Water | |||||||||||
| Altar of Fire | |||||||||||
| Altar of Earth | |||||||||||
| Altar of Thought | |||||||||||
| Pyre | |||||||||||
| Towns | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
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Building cost: 5000 
5 
.
Buildings required: Pyre (← Altar of Thought ← Altar of Earth, Altar of Fire ← Altar of Water, Altar of Air ← Mage Guild, Magic Lantern ← Fort).
Vault of Ashes is a new Conflux special structure introduced in Horn of the Abyss. It increases the growth of the Firebird and Phoenix by 1. Originally, Pyre was producing 2 Firebirds or Phoenixes itself, and reducing their basic growth to 1 is one of the changes intended to nerf Conflux, which was considered too broken by Horn of the Abyss crew.
It is the only Horde Building which increases growth of Tier a 7 unit.
Unlike other Horde buildings, Vault of Ashes is considered a separate structure to the Pyre. Building it will increase the damage of the town's Arrow towers accordingly.