By letting Magus of the Future turn the top of your library into an extension of your hand, you can cast spells directly from it without ever losing your ammunition. Sensei's Divining Top fuels this loop by tapping to draw a card while tucking itself neatly back onto that very same top deck, ready to be played again. Meanwhile, Umori, the Collector sits on the battlefield quietly reducing the cost of your artifacts, allowing you to cast Sensei's Divining Top for free over and over again to rack up infinite draws and an endless storm count.