Miirym, Sentinel Wyrm, Bladewing the Risen, and Pandemonium

Prerequisites

• Miirym, Sentinel Wyrm on the battlefield
• Bladewing the Risen in hand
• Pandemonium on the battlefield
• available

Steps

1. Cast Bladewing by paying
2. When Bladewing enters the battlefield, it, Pandemonium and Miirym trigger
3. Resolve the Bladewing trigger, returning any Dragon from your graveyard to the battlefield
4. Resolve the Pandemonium, dealing 4 damage to Bladewing
5. Bladewing dies as a state-based action due to having 0 toughness
6. Resolve the Miirym trigger, creating a nonlegendary token copy of Bladewing
7. When the Bladewing token enters the battlefield, it and Pandemonium trigger
8. Resolve the Pandemonium trigger, dealing damage to any target
9. Resolve the Bladewing token's trigger, returning Bladewing from your graveyard to the battlefield
10. Repeat from step 2

Results

• Infinite LTB
• Infinite ETB
• Infinite death triggers
• Infinite damage
• Infinite creature tokens