Sensei's Divining Top + Cloud Key + Crystal Skull, Isu Spyglass

Sensei's Divining Top

Cloud Key

Crystal Skull, Isu Spyglass

How it works

1. Activate Sensei's Divining Top by tapping it, causing you to draw a card and put Sensei's Divining Top on top of your library.
2. Cast Sensei's Divining Top from the top of your library by paying 0.
3. Repeat

This elegant loop turns Sensei's Divining Top into a free, self-sustaining engine by manipulating its mana value and zone transitions. Cloud Key provides the crucial cost reduction, dropping the casting price of artifacts to zero so you can immediately replay the Top from the top of your library. Meanwhile, Crystal Skull, Isu Spyglass accelerates the loop by letting you look at the top card of your library at any time and casting historic spells right from the top, all while tapping for blue mana if needed. The result is an endless cycle of drawing cards, tapping, and recasting that generates infinite draw triggers and a boundless storm count.