Mortuary, Mogg Fanatic, Bolas's Citadel, and Sifa Grent

Prerequisites

• Mortuary on the battlefield
• Mogg Fanatic in hand
• Bolas's Citadel on the battlefield
• Sifa Grent on the battlefield

Steps

1. Cast Mogg Fanatic by paying its mana cost
2. Activate Mogg Fanatic by sacrificing it
3. When Mogg Fanatic dies, Mortuary and Sifa Grent trigger
4. Resolve the Mortuary trigger, putting Mogg Fanatic from your graveyard onto the top of your library
5. Resolve the Sifa Grent trigger, causing target opponent to lose 1 life and you to gain 1 life
6. Cast Mogg Fanatic from the top of your library by paying 1 life
7. Repeat from step 2

Results

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