Originally posted by Rhapsody:

Blood magic - already exists, with summons and buffs

Rune magic - already exists, it's the backbone of all magic available to vikings in the game

Pathfinding - would probably defeat efforts of exploring on your own, it wouldn't be worth spending inventory slots for anyway. Vegvisir already exist to assist with navigation.

i havent seen rune magic being expressed in the game with any of the different meanings / functions behind the runes

We're also being guided plenty by Hugin, im not a fan of handholding in videogames personally and hopefully it doesnt go any further than this in the future except for leaving hints and clues from the gods