Sister Campbell

It is 793 AD and you are one of the first Norsemen to land. In need of supplies and expanding your tribes territory you went raiding, coming up upon a monetary where you meet Sister Trinity Campbell adopted daughter of the Bishop to the region. Devoted to the cloth and aspiring to guide her own flock, but the most interesting thing is the double sided key she holds. The key to the kings' tombs where legends say lies lots of gold and legendary armor and weapons. How will you aquire the key?