Cloud of Faeries, Coffin Queen, Intruder Alarm, and Phyrexian Tower

Prerequisites

• Cloud of Faeries in the graveyard
• Coffin Queen on the battlefield
• Intruder Alarm on the battlefield
• Phyrexian Tower on the battlefield
• Coffin Queen does not have summoning sickness
• available

Steps

1. Put Faeries into a graveyard if not already there by casting and/or sacrificing them
2. Activate Coffin Queen targeting Faeries
3. When Faeries enter the battlefield, stack the triggers to untap lands first, then untap Coffin Queen and sacrifice Faeries to Tower while Queen's exile trigger is on the stack
4. Repeat from Step 2
5. If a land you control (other than Tower) taps for more than one mana, make infinite mana

Results

• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite sacrifice triggers
• Infinite untap of all creatures (including opponents')