Let's go treasure hunting!

Requirements: Level 15+
 
The event lasts 6 days.
 
When you access the event, you see a field with cells. You need to dig up these cells using shovels and tractors from the right side of the event screen. Click on a shovel or tractor to select it and use it on the field.
 
Each cell that you dig up brings you rewards. The cells that you have already opened are marked accordingly. You can receive a reward from each cell only once.

How to play?

1. Choose the tool you'd like to dig with on the right side of the event window.

2. Click on a cell on the field to dig. 
There are 2 types of cells: simple and complex ones.
Simple cells open after one dig with shovel/tractor. If you dig a cell and receive a reward immediately - it is a simple cell.
Complex cells open after two digs with shovel/tractor. If you dig a cell and see a chest - it is a complex cell. You need to dig it once again to receive a reward.

3. Receive the reward! The rewards include superbucks, seasonal currency, Explorer's coins and more!

4. Continue digging to find a magic key that can be exchanged for one of the two main rewards.

How to get the tools and what tools are there?

You start with 10 shovels.
 
You can also claim:
1 free shovel every 8 hours
and up to 3 in 24 hours.
 
 
Please note: You can have 35 shovels maximum at any given time. If you reach this limit, you won't be able to claim/receive any new shovels until you spend at least one.

Note: On the field you might find a discount coupon: use it to get a discount on the shovel offers! The discount coupon lasts for 12 hours once you find it, but you can only use it 1 time.

Your tools:

Shovel: digs only in 1 square
 
 
Tractor: digs in 4 squares at once. If the tractor's digging zone intersected with an already uncovered square(s), these squares will be refunded to you in the form of shovels.
 
 
Metal detector: helps identify cells with hidden treasure chests.
Once selected, it can check the area of 9 squares. 
 
Choose the area you wish to check and click on it. If there are cells with hidden treasure chests (complex cells), they will be marked with a cross once you apply the tool.
 
The identified complex cells (cells marked with a cross) require two digs with any tool. The remaining cells are simple ones - they will reveal a reward after one dig.

What are the Explorer’s Coins?

You can find the Explorer’s coins on the field. You can use these coins in the "Treasures" tab to get buildings, decorations, or items you need for quests!
 
 
On the left here you can find items you need in the quests, the list is constantly updated.
On the right you can find other valuable rewards you can buy for Explorer's coins: buildings, decors, superbucks and more!
 
 
Please note: After the Treasure hunt ends, the event store will work for 2 more days. However, after the store closes, too, all your unspent Treasure coins will be automatically converted into valuable items (lucky cards and regular energy).

Main rewards

You need to find a magic key on the event field to receive the main reward. There is only one key per field and it is not easy to find. Once you find it, you can exchange it for any of the two main rewards.
You can obtain a magic key only from a simple cell.

Once you obtain a key, you can refresh the game field. If you continue playing on the same field and open all the cells, the field will refresh automatically.

So, you can refresh the field in 2 ways:
1) After finding the magic key, you can move to a new field by clicking on the respective button that will appear.
2) After you dig out all the squares, the field refreshes automatically.

The main rewards in this event are:

Derry Guildhall  
size 7x9, can be placed anywhere.

4200 coins, 2-3 energy, 1-3 pearls every 24 hours

Baku City Hall
size 10x8, can be placed anywhere

4200 coins, 2-3 energy, 1-3 pearls every 23 hours

Please note:  If you fail to exchange your magic key(s) for the building(s) before the event ends, each key will be converted into 750 lucky cards. You will not be able to claim/receive a building in this case.
Please note: The 3rd magic key can be used to open a chest with 750 lucky cards that you can then exchange for the blueprints of chest buildings in the blueprint shop.