Silent Springs

This is a low level resource building. It is one of the better ones from Grimalkins . If you have it and no other building is better it is an easy upgrade to max level does not cost much. 
You can obtain this building through the following means:
* Possible Reward when you defeat a Grimalkins
* Possible Reward when you defeat a Grimalkins boss
* Defeat a Rival that has this building in there city
Lvl	Health	Gold
/hr	Cap 	Sale
Price	Upgrade
Cost	Total
Investement
11 	346 	945 	3780		1600	5800
12 	369 	1005	4020		1850	7400
13 	395 	1065	4260		2150	9250
14 	424 	1110	4440		2450	11,400
15 	458 	1155	4620		2700	13,850
16 	497 	1170	4680		3000	16,550
17 	542 	1185	4740		3300	19,550
18 	596 	1200	4800		3600	22,850
19 	662 	1215	4860		3800	26450
20 	741 	1230	4920		NA 	30,250