It looks like the game sees you need to bronze medal troops for power level 22 and incorrectly throws you a troop offer, see this analysis. Adding medals to enough Mist of Scales troops will likely make this offer disappear for the time being.
It looks like the game sees you need to bronze medal troops for power level 22 and incorrectly throws you a troop offer, see this analysis. Adding medals to enough Mist of Scales troops will likely make this offer disappear for the time being.