Veinwitch Coven, Phyrexian Altar, Memnite, and Blood Artist

Prerequisites

• Veinwitch Coven on the battlefield
• Phyrexian Altar on the battlefield
• Memnite on the battlefield
• Blood Artist on the battlefield

Steps

1. Activate Phyrexian Altar by sacrificing Memnite, adding
2. Memnite dies, triggering Blood Artist, causing target player to lose 1 life and you to gain 1 life
3. Veinwitch Coven triggers, causing you to pay to return Memnite from your graveyard to your hand
4. Cast Memnite by paying
5. Repeat

Results

• Infinite death triggers
• Infinite ETB
• Infinite lifegain
• Infinite lifegain triggers
• Infinite lifeloss
• Infinite LTB
• Infinite sacrifice triggers
• Infinite storm count