Material

Materials are items in  that are using in crafting weapons and consumables.

List of Special materials
Special materials are key components for upgrading hero items

Special materials can be acquired through completing quests and from chests. In addition, special materials become available in Aegir's Tavern after completing the relevant hero's arc. Finally, special items can be farmed by completing the relevant Valkyrie Challenge once it becomes available to you.

List of Animal Materials
Animal materials are key components for upgrading followers

Animal materials can be acquired through completing quests and from chests. In addition, basic animal materials become available in Aegir's Tavern once you have transformed a new animal. Finally, animal items can be farmed by returning to the location you originally transformed the animal, to repeatedly kill them in god form. Each animal material can be upgraded into a superior version, which is required for higher level follower upgrades.