DISCLAIMER: Always keep empty space in your inventory at all times, especially when you're about to receive an item, and make sure that you are not overweight. The ExperienceRO team will not be held responsible for any losses due to users' own actions. It is players' responsibility to read the Rules and Regulations and the Warnings.
Odin's Armory is a room in which Eir sits, the provider of the Odin Set. After completing Chapter 1 and Chapter 2, you can talk to Valkyrie to have her warp you to the armory. There are cases where she wouldn't warp you. In this case, try killing a monster or getting your character killed then try again. If she still doesn't warp you, then use @request (Reporting Guidelines) and ask for a GM to check your Storyline.
When Valkyrie warps you to the Armory, there will be a server-wide announcement saying:
Valkyrie: 'Player' has entered the Odin's Armory.
Odin's Set equipment are set-bound, meaning that they will only work if you're wearing all parts. If one part is missing or if you're wearing a non-Odin item (example: costumed path headgear), the Odin effects will not work.