I love the Iron Throne made by Revennant, thank you very much for this great work. But the base wasn't really my choise, so I cutted the old base off on my first print of this throne and printed without any base at all (http://www.thingiverse.com/make:303776).
Than I saw a make of the throne with another base (http://www.thingiverse.com/make:304512). Txispas shared his base and now for those who don't want to fiddle around with the stl and obj files here is the ready-to-print remix.
If you aren't printing on a raft and aren't afraid of loosing some details on the bottom, then set the z position offset in your slicer to -1.0mm, this would stick the bottom great to the printing bed.