There are numerous artifact sets in God of War Ragnarok, the largest of which is called Kvasir's Poems. Unlike all of the other collectible sets in the game, which tend to be confined to just one single location, Kvasir's Poems can be found throughout multiple realms, including several that already have their own dedicated sets. It's also the largest set of collectibles in God of War Ragnarok, with 14 different poems for players to track down.