Sensei's Divining Top + One with the Multiverse + Cheering Fanatic

Sensei's Divining Top

One with the Multiverse

Cheering Fanatic

How it works

1. Declare Cheering Fanatic as an attacker. When it triggers, choose to name "Sensei's Divining Top".
2. 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.
3. Cast Sensei's Divining Top from the top of your library by paying 0.
4. Repeat from step 2.

By letting Cheering Fanatic reduce the casting cost of Sensei's Divining Top by {1} whenever it attacks, you completely eliminate the artifact's usual {1} activation fee to inspect your library. This allows you to tap Sensei's Divining Top to draw a card and place it on top of your library, and thanks to One with the Multiverse letting you cast spells directly from the top, you can immediately replay the Top for free. Repeating this loop endlessly cycles the Top through your library to generate infinite draw triggers and an astronomical storm count.