January 7, 2017 8:57 p.m.
I chose to not include cards that can only be used to get rid of a single non-basic, so Dust Bowl's ability to sacrifice land after land to continue to destroy non-basic lands is what puts it squarely into this list.
January 7, 2017 10:13 p.m.
Helldozer was initially dismissed, but being able to pay to destroy two lands because the first one was nonbasic makes this work for this list.
Imagine getting a bunch of black mana from Urborg, Tomb of Yawgmoth plus Cabal Coffers plus Thespian's Stage plus Vesuva plus Nykthos, Shrine to Nyx plus Deserted Temple and then dumping that mana all into Helldozer... The salt would be unreal.