Sensei's Divining Top + Stone Calendar + The Lunar Whale

Sensei's Divining Top

Stone Calendar

The Lunar Whale

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 little loop turns your library into an endless carousel of card draw and storm count by turning Sensei's Divining Top into a free spell. While The Lunar Whale gives you permission to cast the Top directly from the top of your library and Stone Calendar graciously slashes its mana cost down to zero, the Top's own activated ability lets it redraw itself while slipping right back onto your library. Because Stone Calendar makes that {1} re-cast completely free, you can repeat this cycle endlessly without ever running out of mana.