Titania, Nature's Force, Underworld Breach, Phyrexian Altar, and Flamekin Harbinger

Prerequisites

• Titania, Nature's Force on the battlefield
• Underworld Breach on the battlefield
• Phyrexian Altar on the battlefield
• Flamekin Harbinger in the graveyard
• You have at least three additional cards in your graveyard
• available

Steps

1. Cast Flamekin Harbinger from your graveyard for its escape cost by paying and exiling three other cards from your graveyard
2. Flamekin Harbinger enters the battlefield, choose not to search your library
3. Activate Phyrexian Altar by sacrificing Flamekin Harbinger, adding
4. Flamekin Harbinger dies, triggering Titania's second ability, causing you to mill three cards
5. Repeat

Results

• Infinite self-mill
• Near-infinite death triggers
• Near-infinite ETB
• Near-infinite LTB
• Near-infinite sacrifice triggers
• Near-infinite storm count