Scapeshift is mostly known for its power alongside cards like Primeval Titan and Valakut, the Molten Pinnacle in Modern, where the ability to sacrifice any number of lands and then tutor up that many lands and put them directly on the battlefield often ends the game on the spot with a massive pile of Valakut triggers
Keeping a six-mana Planeswalker alive isn't always easy, but if Chandra sticks around, she can pressure the table, clear the board, and refill your hand turn after turn until everyone else starts feeling the heat
Then exile it.) Those who know the alleys and sewers of the Erdwal can disappear like smoke
In fact, theres probably an argument for throwing in a Muraganda Raceway or two as well, to fuel all those extra cards drawn by The Speed Demon
This deck attacks the opponents manabase while trying to maximize its own, an angle of attack that is unique to Modern, which means other decks arent prepared for it