Elsha of the Infinite, Sensei's Divining Top, and Cheering Fanatic

Prerequisites

• Elsha of the Infinite on the battlefield
• Sensei's Divining Top on the battlefield
• Cheering Fanatic on the battlefield
• Cheering Fanatic does not have summoning sickness

Steps

1. Declare Cheering Fanatic as an attacker
2. Cheering Fanatic triggers, choosing "Sensei's Divining Top"
3. Activate Sensei's Divining Top's second ability by tapping it, causing you to draw a card and put Sensei's Divining Top on top of your library from the battlefield
4. Cast Sensei's Divining Top from the top of your library by paying
5. Elsha of the Infinite's prowess ability triggers, giving itself +1/+1 until end of turn
6. Repeat from step 3

Results

• Infinite card draw
• Infinite draw triggers
• Near-infinitely large Elsha of the Infinite until end of turn
• Near-infinite storm count