Liliana, Untouched by Death, Rooftop Storm, and Sidisi, Undead Vizier

Prerequisites

• Liliana, Untouched by Death on the battlefield
• Rooftop Storm on the battlefield
• Sidisi, Undead Vizier in hand or in the graveyard

Steps

1. Activate Liliana's third ability by removing three loyalty counters from it, allowing you to cast Zombie cards from your graveyard this turn
2. Cast Sidisi either from your hand or from your graveyard by paying
3. When Sidisi enters, it triggers, causing you to sacrifice it
4. Sidisi triggers, causing you to search your library for a card and put it into your hand
5. Repeat from step 2

Results

• Infinite creature ETB
• Infinite creature LTB
• Infinite card draw
• Infinite death triggers
• Infinite creature sacrifice triggers
• Infinite storm count