You'll receive a PDF copy of Metallic Tome. You'll also get a link to order an at-cost (cheap) copy of the print book from Lulu. Backers at this level are tr00 kvlt headbangers, and command respect from the Infernal Armies.
Receive the Print & PDF rewards. Then you may conjure from me a customized monster, spell, encounter or other game element. Your description can be as long or short as you like. The content that I write for you will be a page or two in length. I will include it in the Metallic Tome, unless there are a lot of backers at this level -- if that's the case, I'll put the custom content in a separate expansion, which I'll work on after the Metallic Tome is released. I want to be sure that the Tome is not delayed. Backers at this level surely sit upon a throne of METAL, surrounded by empty beer cans and the skulls of their enemies.