Etali, Primal Conqueror // Etali, Primal Sickness, Haunted Crossroads, and Phyrexian Altar

Prerequisites

• Etali, Primal Conqueror // Etali, Primal Sickness in hand
• Haunted Crossroads on the battlefield
• Phyrexian Altar on the battlefield
• available

Steps

1. Cast Etali by paying
2. When Etali enters the battlefield, it triggers
3. Holding priority, activate Phyrexian Altar by sacrificing Etali, adding
4. Activate Haunted Crossroads by paying , putting Etali on top of your library from your graveyard
5. Resolve the Etali trigger from step 2, causing you to exile cards from each player's library until you exile a nonland card, with you exiling Etali from your library, and cast Etali and any other nonland cards exiled this way without paying their mana costs
6. Repeat from step 2

Results

• Cast all nonland cards from each opponent's library
• Exile each opponent's library
• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite sacrifice triggers
• Infinite storm count
• Near-infinite magecraft triggers