That could be a wate of excellent troops. The principle is to employ Infantry, Cavalry and Occult to earn Beastiary. Do not use legendaries. They do not rely for resources. Also, a favorite of many a wraith is just not acquired with resources so it doesn't add for the lender. https://rafaelospjc.answerblogs.com/28087180/stormfall-age-of-war-for-dummies