Ragost, Deft Gastronaut, Cauldron Familiar, Sword of the Meek, and Umbral Collar Zealot

Prerequisites

• Ragost, Deft Gastronaut on the battlefield
• Cauldron Familiar in the graveyard
• Sword of the Meek on the battlefield
• Umbral Collar Zealot on the battlefield

Steps

1. Activate Cauldron Familiar by sacrificing Sword of the Meek, which is a Food due to Ragost, returning Cauldron Familiar from your graveyard to the battlefield
2. When Cauldron Familiar enters, it and Sword of the Meek trigger
3. Resolve the Cauldron Familiar trigger, causing each opponent to lose 1 life and you to gain 1 life
4. Resolve the Sword of the Meek trigger, returning it from your graveyard to the battlefield attached to Cauldron Familiar
5. Activate Umbral Collar Zealot by sacrificing Cauldron Familiar
6. Repeat

Results

• Infinite LTB
• Infinite ETB
• Infinite sacrifice triggers
• Infinite death triggers
• Infinite lifegain triggers
• Infinite lifegain
• Infinite lifeloss
• Infinite surveil 1