Halvar, God of Battle // Sword of the Realms, Blessed Sanctuary, Phyrexian Altar, and Ornithopter

Prerequisites

• Halvar, God of Battle // Sword of the Realms on the battlefield
• Blessed Sanctuary on the battlefield
• Phyrexian Altar on the battlefield
• Ornithopter on the battlefield
• Sword of the Realms attached to Ornithopter

Steps

1. Activate Phyrexian Altar by sacrificing Ornithopter, adding
2. When Ornithopter dies, Sword of the Realms triggers, returning Ornithopter to your hand from your graveyard
3. Cast Ornithopter by paying
4. When Ornithopter enters the battlefield, Blessed Sanctuary triggers, creating a 2/2 Unicorn creature token
5. Activate Phyrexian Altar by sacrificing the Unicorn, adding
6. Activate Sword of the Realms' equip ability by paying , attaching it to Ornithopter
7. Repeat

Results

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