Another video was released for Pillars of Eternity: The White March about Soulbound Weapons, and don't forget the expansion will be released tomorrow.
Link - https://www.youtube.com/watch?v=mapq2iJbwgk
Link - https://www.youtube.com/watch?v=mapq2iJbwgk
Adam Brennecke describes one of the new class of items in The White March - soulbound weapons.