Teysa Karlov, Oathsworn Vampire, Pitiless Plunderer, Lord of the Forsaken, and Zulaport Cutthroat

Prerequisites

• Teysa Karlov on the battlefield
• Oathsworn Vampire on the battlefield
• Pitiless Plunderer on the battlefield
• Lord of the Forsaken on the battlefield
• Zulaport Cutthroat on the battlefield
• available

Steps

1. Activate Lord of the Forsaken's first ability by paying and sacrificing Oathsworn Vampire
2. When Oathsworn Vampire dies, Pitiless Plunderer and Zulaport Cutthroat trigger twice
3. Resolve both Pitiless Plunderer triggers, creating two Treasure artifact tokens
4. Resolve both Zulaport Cutthroat triggers, causing each opponent to lose 2 life and you to gain 2 life
5. Resolve the Lord of the Forsaken ability from step 1, causing target player to mill three cards
6. Activate Lord of the Forsaken's second ability by paying 1 life, adding that can only be spent to cast a spell from your graveyard
7. Activate both Treasures by tapping and sacrificing them, adding
8. Cast Oathsworn Vampire from your graveyard by paying
9. Repeat

Results

• Infinite death triggers
• Infinite ETB
• Infinite lifegain
• Infinite lifegain triggers
• Infinite lifeloss
• Infinite LTB
• Infinite mill
• Infinite sacrifice triggers
• Infinite self-mill
• Infinite storm count