Skräckhussamlingen
The grand prize in the 2021 Halloween Event, is not one, but five different unique event buildings! Each of these Horror Circus buildings can be upgraded two levels, have a base bonus, as well as different connector bonuses as part of a set (with different bonuses being provided, as you connect more buildings within the set). Therefore, individually they could be lethal, but as a set, positively deadly!
| Terror Teacup (2x3)
Lv. 1 |
Terror Teacup upgrade kit | Terror Teacup (2x3)
Lv. 2 |
|---|---|---|
 |
 |
 |
0   1 4% 2 3% 3 3% |
--- |
0 1 8% 2 6% 3 6% |
| Mystical Organ (3x1)
Lv. 1 |
Mystical Organ upgrade kit | Mystical Organ (3x1)
Lv. 2 |
 |
 |
 |
| 0 1 4% 2 1% 3 2% |
--- |
0 1 8% 2 4% 3 5% |
| Helter Skelter (3x3) - Lv. 1 | Helter Skelter Upgrade kit | Helter Skelter (3x3) - Lv. 2 |
 |
 |
 |
| 0 neg. 1 2 1 3 3 4 4 |
--- |
0 neg. 1 2 2 3 6 4 8 |
| Clown Town (5x2) - Lv. 1 | Clown Town Upgrade kit | Clown Town (5x2) - Lv. 2 |
 |
 |
 |
| 0 neg. 1 1 2 5 |
--- |
0 neg. 1 2 2 15 |
| Wheel of Death (2x1) - Lv. 1 | Wheel of Death upgrade kit | Wheel of Death (2x1) - Lv. 2 |
 |
 |
|
0  1 |
--- |
0 1 |
Upgrading the Horror Circus Set
In order to bring one of the Horror Circus Set Buildings to the next level, you will need the unique upgrade kit for each building seen above. Alternatively, you can also use the Horror Circus Selection Kit to upgrade any of the set buildings.
The Horror Circus Selection Kit
If you use the Horror Circus Selection Kit, a window will open that allows you to either upgrade one of your existing Horror Circus Set Buildings to Level 2 or build a new Level 1 Horror Circus Set Building.
Choose "Build" and you can directly place the building in your city. Choose "Upgrade" and you can upgrade an existing level 1 building in your city.