Requirements: the chests will be received by players level 15+

The main reward is the Linxia Grand Theater (4,400 coins, 2-3 energy, 1-4 daffodils every 24 hours, size 8*8, can be placed anywhere)

Each chest can be opened for 9 Spring keys.

There are 3 ways to get Keys:

  1. Completing the quest:

Friend to Science I (3 keys)

Collect 17 Maps of the stars (Stationery Shop, Upgraded Stationery Shop)
Collect 31 Ropes (Textile Factory - all, Upgraded Textile Factory - Wool, Felt, Cashmere)
Collect 24 Saws (Colonial House, Upgraded Colonial House)

Friend to Science II (3 keys)

Collect 33 Saplings (Summer House, Upgraded Summer House)
Collect 14 Planks (Cargo Port)
Collect 26 Fertilizers (Farm, Upgraded Farm - Beetroot)

Friend to Science III (4 keys)

Collect 14 Screw nuts (Subway station, Upgraded Subway Station, Central Station, Eastern Station)
Collect 11 Screw wenches (do not drop every time - from friends’ cities, buildings with a clock or coin)
Ask friends for 7 Repair Kits

2. Collect profits from the following buildings:

  • Supertanic Liner - 1 key every 24 hours;
  • Windmill - 1 key every 18 hours;
  • Rotunda de Mosta - 2-3 keys every 22 hours;
  • Bremen City Hall - 2-4 keys every 24 hours;
  • Hazrat Sultan - 2-3 keys every 24 hours.

3. Use the sale offer!


Special offer with the Linxia Grand Theater chest event


  • Hazrat Sultan: 3,900 coins, 3-4 energy, 3-4 daffodils, 2-3 spring keys during the Linxia Grand Theater chest event every 24 hours, 150 marathon points one time when buying;
  • Rotunda of Mosta: 3,700 coins, 1-3 energy, 2-4 daffodils, 2-3 spring keys during the Linxia Grand Theater chest event every 22 hours, 150 marathon points one time when buying;
  • Bremen City Hall: 3,900 coins, 3-4 energy, 2-5 daffodils, 2-4 spring keys during the Linxia Grand Theater chest event every 24 hours, 150 marathon points one time when buying;
  • Pennsylvania Academy of Arts: 3,850 coins, 1-3 energy every 22 hours, 150 marathon points one time when buying;
  • Corvin Castle: 4,100 coins, 3-5 energy, every 18 hours, 80 marathon points one time when buying;
  • Hungarian Parliament: 4,100 coins, 2-4 energy every 20 hours