Sash and Waistcoat, Unmen, Soul Warden, Agatha of the Vile Cauldron, and Carnival of Souls

Prerequisites

• Sash and Waistcoat, Unmen on the battlefield
• Soul Warden 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, Soul Warden and Carnival of Souls trigger
3. Resolve the Soul Warden trigger, causing you to gain 1 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 triggers