Sash and Waistcoat, Unmen, Verdant Sun's Avatar, Agatha of the Vile Cauldron, and Carnival of Souls

Prerequisites

• Sash and Waistcoat, Unmen on the battlefield
• Verdant Sun's Avatar on the battlefield
• Agatha of the Vile Cauldron on the battlefield
• Carnival of Souls on the battlefield
• available

Steps

1. Activate Sash and Waistcoat by paying due to Agatha of the Vile Cauldron, manifesting the top card of your library
2. When the manifested card enters, Verdant Sun's Avatar and Carnival of Souls trigger
3. Resolve the Verdant Sun's Avatar trigger, causing you to gain life Resolve the Carnival of Souls trigger, adding and causing you to lose 1 life Repeat

Results

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