Hey. I share this with you because I failed one war attack because poison spell use in a war. in dragoon, Clan castle is useless because they can basically do nothing against dragons so its not necessarily to poison the troops. But happened to some of you that skelly traps to kill a horde of balloons? Exactly that happened to me in first attack and because of that got only a 87% 2 star. Next attack I attacked higher but this time I learnt my lessons. Skelly traps pop up near clan castle balloons , put a poison spell on skelly traps and balloons did their job. Got a 3 star. So if you use dragoons, poisoning clan castle dragon is useless and better use it like this. It may make a one star difference.