Requirements: the chests will be received by players level 15+
Main reward is The Blue Mosque (5,100 coins, 3-5 energy, 3-5 pearls every 24 hours, 10 marathon points for 16 days, size 8*10, can be placed anywhere except the Snowy Plateau)
Each chest can be opened for 9 Summer keys.
There are 3 ways to get Keys:
1. Complete the quests:
I
Black paint - 6 pcs. (ask friends)
Glasses - 31 pcs. (Summer House, Upgraded Summer House)
Freeze gel tube - 29 pcs. (Convenience store, Upgraded Convenience store)

II
Paper tape - 25 pcs. (Bakery, Upgraded Bakery)
Photo frame - 15 pcs. (Stationery Shop, Upgraded Stationery Shop)
Pack of tissues - 36 pcs. (Hostel, Upgraded Hostel, Family house)

III
Concrete compound- 13 pcs. (Construction factory, Upgraded Construction Factory)
Wooden beam - 7 pcs. (Cargo Port)
Trowel - 37 pcs (Subway Station, Upgraded Subway Station)

IV
Wool - 15 pcs. (Textile factory, Upgraded Textile factory)
Throw Blanket - 39 pcs. (Colonial House, Upgraded Colonial House)
Bow - 37 pcs. (Flower Kiosk, Upgraded Flower Kiosk)

2. Collect profits from the following buildings:

  • The Paleontological Museum (0-1 keys every 8 hours)
  • Central station (1 key every 24 hours)
  • Palace of Fine Arts (2-4 keys every 18 hours)
  • Laxminarayan Temple (2-4 keys every 24 hours)
  • Maritime College (2-4 keys every 24 hours)
  • The Spanish Park (3-4 keys every 24 hours)

3. Use the sale offer!

Special Offer:

Palace of Fine Arts: 3,800 coins, 2-4 energy, 2 xp points, 2-3 pearls every 18 hours, 5-7 marathon points for 16 days, 2-4 summer keys during the chest event
Center of Culture: 5,500 coins, 3-5 energy, 4-6 pearls, 3-5 summer keys during the chest event, 5-7 marathon points for 16 days
Laxminarayan Temple: 4,400 coins, 2-3 energy, 2-4 summer keys during the chest event
Maritime College: 4,250 coins, 3-5 energy, 2-4 summer keys during the chest event
The Spanish Park: 4,300 coins, 3-5 energy, 3-4 summer keys during the chest event