Falco Spara, Pactweaver, Sensei's Divining Top, Phyrexian Altar, and Geralf's Messenger

Prerequisites

• Falco Spara, Pactweaver on the battlefield
• Sensei's Divining Top on the battlefield
• Phyrexian Altar on the battlefield
• Geralf's Messenger on the battlefield
• Geralf's Messenger does not have a +1/+1 counter on it

Steps

1. 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
2. Activate Phyrexian Altar by sacrificing Geralf's Messenger, adding
3. When Geralf's Messenger dies, its undying ability triggers, returning itself from your graveyard to the battlefield with a +1/+1 counter on it
4. When Geralf's Messenger enters the battlefield, it triggers, causing an opponent to lose 2 life
5. Cast Sensei's Divining Top from the top of your library by paying and removing the +1/+1 counter from Geralf's Messenger
6. Repeat

Results

• Infinite card draw
• Infinite draw triggers
• Near-infinite death triggers
• Near-infinite ETB
• Near-infinite lifeloss
• Near-infinite LTB
• Near-infinite sacrifice triggers
• Near-infinite storm count