If you want to learn more about K-Runs brewing process, check out this recent interview I had with him
Look at most competitive or even just well-developed decks and you can probably find some ETB or dying triggers
The cards we cut arent even particularly bad for this deck, just a little expensive for what we can get from them
Bojuka Bog Celestial Colonnade Creeping Tar Pit Dread Statuary Eye of Ugin Halimar Depths Khalni Garden Lavaclaw Reaches Quicksand Raging Ravine Sejiri Steppe Smoldering Spires Stirring Wildwood Tectonic Edge
Mina and Denn, Wildborn, Azusa, Lost but Seeking, and Aesi, Tyrant of Gyre Strait each allow you to do this
Used properly, this can prove to be utterly devastating to an opponents plans