Summoners War Sky Arena Wiki
Summoners War Sky Arena Wiki

The Unknown Object is a decorative building which can hold up to a maximum of 3 monsters.


To put a monster in the Unknown Object, select the building and then click on Place. From there, select any monster you want from the menu. Alternatively, you can also press and hold on a monster, then drag it onto the building. If a green arrow pointing downwards appears, it means that the building has vacancy and monsters can be dropped in it. If a red arrow pointing downwards appears, it means that the building is full.

Monsters placed here will stop wandering around the player's island. If it is moved, the monsters go with it. Placing monsters in the Unknown Object (or any other building) will prevent those monsters from being moved into Storage, or sacrificed as power-up material. They can still be used for arena, guild wars, dungeons, etc.

An Action button is also available, allowing the players to play the short animation of the building as they please.


The Unknown Object is a crafted building. In order to craft it, the player must pay not only the mana stones, but also the following crafting materials :

Image Name Quantity
Hard Wood.png Hard Wood 10
Solid Rock.png Solid Rock 25
Shiny Light Crystal.png Shiny Light Crystal 200
Pitch-black Dark Crystal.png Pitch-black Dark Crystal 200
Condensed Magic Crystal.png Condensed Magic Crystal 300

Main Buildings Summoner's TowerSummonhengeGatewayPower-Up CircleArcane TowerMagic ShopTemple of WishesTransmogrification BuildingFuse CenterFusion HexagramMonster StorageCraft Building Glory Buildings Sanctum of EnergyFairy TreeMana FountainMysterious PlantCrystal RockGuardstoneWater SanctuaryFire SanctuaryWind SanctuaryLight SanctuaryDark SanctuaryAncient SwordCrystal AltarSky Tribe TotemArcane Booster TowerFallen Ancient Guardian
Experience Buildings Tranquil ForestCrystal LakeGusty CliffsPractice Battle Field Mana Stone Buildings Ancient StonesPond of ManaDeep Forest Ent
Crystal Buildings Crystal MineCrystal TitanCrystal Dragon Guild Buildings Flag of RageFlag of HopeFlag of WillFlag of BattleGuild Magic Shop
World Arena Buildings Ellia's Cozy Little HouseShiny Fairy Tree Stable Limited Buildings (Event) Winter Forest BonfireStatue - Legend of the ArenaEerie GardenSnowy Garden
Limited Buildings (In-Game Purchase) Statue - Holy Land ProtectorStatue - Goddess AmeriaSWC 2017 FlagSWC 2018 Flag Crafted Buildings Surveillance TowerRainbow PondFirework LauncherFountain GardenCommand PostUnknown ObjectStatue - Ancient GiantStatue - Ancient DragonStatue - Ancient Lich KingStatue - Ancient GuardianCrystal DragonPractice Battle FieldFlying BoatStable with a WindmillBuilding Storage