1grail: Attrition -3% (units permamently lost at end of a fight)
2grails: City limit +1
3grails: Capture timing bonus -15%
4grails: Attrition -3%
5grails: City limit +1
6grails: Capture timing bonus -15%
7grails: Attrition -3%
8grails: City limit +1
9grails: Capture timing bonus -15%
10grails: Defense bonus to your alliance (+16%)
11grails: Defense bonus to your alliance (+8%)
12grails: Defense bonus to your alliance (+4%)
13grails: Defense bonus to your alliance (+2%)
Next grails: Defense bonus to your alliance (+1%)
