Champions of Midgard Valhalla E

The Valhalla expansion to Champions of Midgard adds new mechanics in the form of a new resource to manage, secondary leader abilities, and leader dice which join on the battle field. Now when your warriors die in battle, they help you by gaining favor in Valhalla. Will you use your fallen warriors to defeat the epic monsters or will you gain favor with the Valkyrie and receive their help in the form of blessings, artifacts, and powerful berserkers and shield warriors?.