Horn of the Abyss 僅在啟用非官方擴展包「深淵號角」時可用。
Cove buildings
Halls
Village Hall
Town Hall
City Hall
Capitol
Fortifications
Fort
Citadel
Castle
Common
Blacksmith
Mage Guild
Marketplace
Resource Silo
Tavern
Specific
Pub
Roost
Grotto
Thieves' Guild
Shipyard
Lodestar
Dwellings
Nymph Waterfall
Shack
Frigate
Gunpowder Warehouse
Nest
Tower of the Seas
Nix Fort
Maelstrom
Towns
Castle Rampart Tower
Inferno Necropolis Dungeon
Stronghold Fortress Conflux
Cove
GrottoGrotto
Cove grotto (outline).gif
前提條件
Marketplace
費用
Wood15 Ore15 Gold7500
效果
Allows the guest hero to sacrifice creatures or artifacts for experience.

Building cost: 7500 Gold 15 Wood 15 Ore.
Buildings required: Marketplace.

Grotto is a Cove town special structure which allows the guest hero to sacrifice creatures or artifacts, gaining experience. Works like Altar of Sacrifice.