Board Thread:Questions and Answers/@comment-75.146.150.237-20190106012220/@comment-108.51.146.201-20190106033918

See the "Army" page. Having both Dusty Horde and Ari Garda means a -1 synergy bonus, which is counted when calculating what size reward you get from Orcent

http://thelastsovereign.wikia.com/wiki/Army#Impending_Horde_Battle