Image of Yggdrasil Tree obtained from: https://www.google.ca/search?q=free+photos+of+yggdrasil&source=lnms&tbm=isch&sa=X&ved=0ahUKEwjKmubFtIDcAhWC5YMKHfqAD_EQ_AUICigB&biw=1280&bih=603#imgrc=s-xRnLpIJSl8EM: