Running out of space in your habitats? This building will allow you to store a large number of monsters, so you can call them to your army whenever you need them!
The Monster Vault is a long-term storage solution for monster collectors. It is 5x5 building that can be purchased at player level 70, costs 20,000,000 
and takes 2 days to build.
Monsters can be directly hatched into it from the Hatchery. Once inside, monsters stop generating gold but can otherwise be used normally in the game without having to be removed.
Slots[]
Storage slots may be purchased with 5 
or 
(see table below). For every player level above 70, players earn 5 for free. Players may also obtain as special prizes in the game. Slots may be purchased with as follows:
| Slots | Cost |
|---|---|
| 2 | Free |
| 3 | 1
|
| 4-5 | 15
|
| 6-10 | 20
|
| 11-15 | 25
|
| 16-20 | 30
|
| 21-25 | 35
|
| 26-30 | 40
|
| 31-35 | 45
|
| 36-45 | 50
|
| 46-55 | 55
|
| 56-65 | 60
|
| 66-75 | 65
|
| 76-85 | 70
|
| 86-100 | 75
|
| 101-115 | 100
|
| 116-130 | 115
|
| 131-145 | 130
|
| 146-160 | 150
|
| 161-185 | 175
|
| 186-1,500 | 200
|