Modern: Medvedev's GW Maverick

Medvedev made the finals of a Modern PE yesterday playing 4 Leonin Arbiter and 4 Mirran Crusader:

This deck has 33 mana sources (25 lands, 4 Birds, 4 Hierarch), including a full 8 faux-Wastelands (Ghost Quarter and Tectonic Edge). It lost to a Huntmaster Jund deck in the final, but it beat a Scapeshift deck and a creatureless Smallpox / Seismic Assault deck in top 8.