Klum

"'On my way back I discovered teleportation!'"Klum is an NPC found in the Temple in Ruby Caverns. After being freed from his cell, he creates a Shop in the Main Area, where players can buy items to start with in exchange for Rubies.

To buy any of the items visible, just right-click the desired item. Only 1 item can be bought per run per person; however, both shops (Klum and Morro) are counted separately. This means that you can start with at most 4 additional items: one from Klum, one from Morro, the Starter Book, and a few Amulets.

Items are refreshed and randomized after each completed (or failed) run. Note how the Bubbly Spell and the Space Scroll are part of the Not Your Vault DLC, but they will appear regardless or you have activated the DLC or not.