Mortuary, Carmen, Cruel Skymarcher, Bolas's Citadel, and Phyrexian Dreadnought

Prerequisites

• Mortuary on the battlefield
• Carmen, Cruel Skymarcher on the battlefield
• Bolas's Citadel on the battlefield
• Phyrexian Dreadnought in the library
• available

Steps

1. Cast Phyrexian Dreadnought from the top of your library by paying 1 life
2. When Phyrexian Dreadnought enters, it triggers, causing you to sacrifice it
3. When Phyrexian Dreadnought dies, Mortuary and Carmen trigger
4. Resolve the Mortuary trigger, putting Phyrexian Dreadnought from your graveyard onto the top of your library
5. Resolve the Carmen trigger, causing you to gain 1 life and put a +1/+1 counter on Carmen Repeat

Results

• Infinite +1/+1 counters on a creature
• Infinite ETB
• Infinite LTB
• Infinite death triggers
• Infinite lifegain triggers
• Infinite sacrifice triggers
• Infinite storm count