We play loads of cheap spells to get on board the same time aggro decks do. All the small units do stuff on entering and dying, whilst being hot bodies for Obelisk. We're also utilising Dredger for some sweet, sweet value. All of those lands we'll inevitably fetch fuel our Obelisk/Ascendant late-game. The removal spells are chosen to neutralize Sandstorm Titan, 'cause I'm not gonna let such a basic card stop our Dredger value train. We've got some lifestealers to keep us in the game while we draw cards, and Ayan is a power-sink.