Bolas's Citadel, Mortuary, and Walking Ballista

Prerequisites

• Bolas's Citadel on the battlefield
• Mortuary on the battlefield
• Walking Ballista in hand or in the library

Steps

1. Cast Walking Ballista either from your hand or from the top of your library by paying
2. Walking Ballista dies as a state-based action due to having zero or less toughness
3. Mortuary triggers, putting Walking Ballista from your graveyard on top of your library
4. Repeat

Results

• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite storm count