From StrategyWiki, the free strategy guide and walkthrough wiki

To get to the store room you first have to go to the map and click on Swordhaven. When you are in Swordhaven go into the inn where you will see Artix and Robina. Then, go upstairs and you will see a room called storage. There are lots of sneevils. They are very easy to kill as they are all level two.

There are two hard monsters in the middle room. The Box Guardian is a level 5 and it drops its "Box Guardian Sword." The boss, Grizzle Spit is level 6 and drops its "Giant Protecter Blade" There are never many people trying to kill Grizzle Spit or in the storage room. All of the monsters in the storage room hardly drop their weapons.