Do the last round in dungeon and fight the final boss, he drops banners all the time, I was after Orc banners but kept getting High elf banners lol

WoodYa said:

I've spent thousands of energy on spider and still have not got a single high elf banner? I was wondering if these banners are very rare or have to buy them to get one? I'm about done with this game if I can't even get a single banner after wasting so much energy