Sash and Waistcoat, Unmen, Biomancer's Familiar, Thunder of Unity, and Davvol, Evincar of Rath

Prerequisites

• Sash and Waistcoat, Unmen on the battlefield
• Biomancer's Familiar on the battlefield
• Thunder of Unity on the battlefield or in the graveyard
• Davvol, Evincar of Rath on the battlefield
• available

Steps

1. Activate Sash and Waistcoat by paying due to Biomancer's Familiar, manifesting the top card of your library
2. When the manifested card enters, Thunder of Unity and Davvol trigger
3. Resolve the Thunder of Unity trigger, causing you to gain 1 life and each opponent to lose 1 life Resolve the Davvol trigger, adding and causing you to lose 1 life Repeat

Results

• Manifest your entire library
• Near-infinite creature ETB
• Near-infinite lifegain triggers
• Near-infinite lifeloss