Ruins are buildings that improve your Clan Backups stats (ATK, DEF, HP and Quantity of Backups deployed).
You place them on your city by going on the Arcane Sanctum, clicking Ruins and then on the Ruin you want to Display. When a Ruin is displayed at your city, it's boosts are bigger than when they are stored. When a ruin reaches lv25, it gets full effect even if stored. It also gives extra buff to Cavalry, Ranged or Infantry troops, when you are using the Backup related to that ruin. You can display up to 3 ruins at a time.
The buff of a ruin is effective only if you are using the Backups related to that ruin. For example, if you are using Solar Tower lvl 25, that gives Infantry HP Up 15% to Spellswords Backups, you will only have Infantry HP boost if you use Spellswords backups in your campaign.
King's Glory[]
Ruins Type: Kingsdor
Unlocked Troops: Kingsdor Cavalry
Shards: Get from [Chapter 1. Kingsdor]
Effect: Reach lvl 25 to get full effect when stored; display to increase Kingsdor attributes.
Solar Tower[]
Ruins Type: Sunsinger
Unlocked Troops: Sunsinger Soldier
Shards: Get from [Chapter 2. Sunsinger]
Effect: Reach lvl 25 to get full effect when stored; display to increase Sunsinger attributes.
Hearthcore[]
Ruins Type: Flamehammer
Unlocked Troops: Flamehammer Fighter
Shards: Get from [Chapter 3. Flamehammer]
Effect: Reach lvl 25 to get full effect when stored; display to increase Flamehammer attributes.
Steam Engine[]
Ruins Type: Steambeard
Unlocked Troops: Steambeard Gunner
Shards: Get from [Chapter 4. Steambeard]
Effect: Reach lvl 25 to get full effect when stored; display to increase Steambeard attributes.
The Guardian[]
Ruins Type: Anthropos
Unlocked Troops: Anthropos Cavalry
Shards: Get from [Chapter 5. Anthropos]
Effect: Reach lvl 25 to get full effect when stored; display to increase Anthropos attributes.
Mystic Moon[]
Ruins Type: Moonseeker
Unlocked Troops: Moonseeker Caster
Shards: Get from [Chapter 6. Moonseeker]
Effect: Reach lvl 25 to get full effect when stored; display to increase Moonseeker attributes.
Claw Throne[]
Ruins Type: Bloodbite
Unlocked Troops: Bloodbite Warrior
Shards: Get from [Chapter 7. Bloodbite]
Effect: Reach lvl 25 to get full effect when stored; display to increase Bloodbite attributes.
Poison Forge[]
Ruins Type: Nightspear
Unlocked Troops: Nightspear Cavalry
Shards: Get from [Chapter 8. Nightspear]
Effect: Reach lvl 25 to get full effect when stored; display to increase Nightspear attributes.
Frozen Egg[]
Ruins Type: Insect
Shards: Get from [Insect] type monsters
Effect: Reach lvl 25 to get full effect when stored; display to increase Insect (Icy Crawler) hunting.
Horned Altar[]
Ruins Type: Fiend
Shards: Get from [Fiend] type monsters
Effect: Reach lvl 25 to get full effect when stored; display to increase Fiend (Ifrit) hunting.
Fang Spring[]
Ruins Type: Mystic
Shards: Get from [Mystic] type monsters
Effect: Reach lvl 25 to get full effect when stored; display to increase Mystic (Decayed Dragon) hunting.