Amareth, the Lustrous, Sensei's Divining Top, and Cheering Fanatic

Prerequisites

• Amareth, the Lustrous on the battlefield
• Sensei's Divining Top in hand
• Cheering Fanatic on the battlefield
• Cheering Fanatic does not have summoning sickness

Steps

1. Declare Cheering Fanatic as an attacker
2. Cheering Fanatic triggers, allowing you to name "Sensei's Divining Top" and cause spells with that name to cost less this turn
3. Cast Sensei's Divining Top by paying
4. Sensei's Divining Top enters the battlefield, triggering Amareth
5. In response, activate Sensei's Divining Top's last ability by tapping it, drawing a card, then putting Sensei's Divining Top on top of your library
6. Resolve Amareth's trigger, putting Sensei's Divining Top from your library into your hand
7. Repeat from step 3

Results

• Infinite card draw
• Near-infinite storm count