Impromptu Raid, Mortuary, Phyrexian Altar, and Burning-Tree Emissary

Prerequisites

• Impromptu Raid on the battlefield
• Mortuary on the battlefield
• Phyrexian Altar on the battlefield
• Burning-Tree Emissary on the battlefield
• available

Steps

1. Activate Phyrexian Altar by sacrificing Burning-Tree Emissary, adding
2. When Burning-Tree Emissary dies, Mortuary triggers, putting Burning-Tree Emissary on top of your library from your graveyard
3. Actviate Impromptu Raid by paying , revealing Burning-Tree Emissary from the top of your library and putting it onto the battlefield
4. When Burning-Tree Emissary enters the battlefield, it triggers, adding
5. Repeat

Results

• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite sacrifice triggers