Open the chests, get the gifts! Brand new Knossos Palace is waiting as a grand prize:

Requirements: level 15.
This offer is available till June, 2 13:00 UTC (9:00 EST).

Gifts don’t repeat!
The grand prize is the Knossos Palace (2,100 coins, 2-4 energy, 1-4 pearls (after the season change) every 16 hours; requires 6x6 squares; can be placed everywhere except the Snow Plateau).

Don’t forget this is a grand prize, so its drop chance is much lower than for other gifts.
Each chest can be opened with 9 Keys.

There are 3 ways to get Keys:

1. Complete the quests:

No timers! You can get keys during the chest offer only.
Reward: 3 keys + 3 keys + 4 keys.

Treasure hunting I (3 keys)
Collect 5 Sensors (Water Tower, Upgraded Water Tower)
Produce 6 lots of Cables (Construction Factory)
Train 4 Mechanics (College)

Treasure hunting II (3 keys)
Collect 18 Maps of the stars (Stationery Shop)
Collect 30 Hamburgers (drop 1-3 at a time – Bistro)
Collect 7 Matches (ask friends)

Treasure hunting III (4 keys)
Collect 17 Scary cookies (Bakery)
Collect 5 Amethysts (drop 1-3 at a time – Luxury Apartment)
Collect 7 Scrolls (do not drop every time – Mansion)

2. Collect profits from the following buildings:

- Crystal Island (3-5 keys every 20h),
- Supertanic Liner (1-2 keys every 24h),
- Berlin Gates (3-5 keys every 18h),
- Forbidden City (3-5 keys every 24h),
- Canadian Parliament (4-6 keys every 24h),
- Lighthouse (1-2 keys every 24h)

3. Use the sale offer and buy some keys with daffodils and cash: