Grolnok, the Omnivore, Sensei's Divining Top, Jace's Erasure, and Starnheim Courser

Prerequisites

• Grolnok, the Omnivore on the battlefield
• Sensei's Divining Top on the battlefield
• Jace's Erasure on the battlefield
• Starnheim Courser on the battlefield

Steps

1. Activate Sensei's Divining Top by tapping it, drawing a card and putting it on top of your library
2. Jace's Erasure triggers, causing yourself to mill Sensei's Divining Top
3. Sensei's Divining Top is put into your graveyard, triggering Grolnok, exiling Sensei's Divining Top with a croak counter on it
4. Cast Sensei's Divining Top from exile by paying
5. Repeat

Results

• Infinite draw
• Near-infinite storm count