Feldon of the Third Path, Diamond Lion, and Intruder Alarm

Prerequisites

• Feldon of the Third Path on the battlefield
• Diamond Lion in the graveyard
• Intruder Alarm on the battlefield
• available

Steps

1. Activate Feldon by paying and tapping it, creating a token copy of Diamond Lion with haste
2. When the Diamond Lion token enters the battlefield, Intruder Alarm triggers, untapping all creatures
3. Activate Diamond Lion by discarding your hand, tapping and sacrificing it, adding
4. Repeat

Results

• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite sacrifice triggers
• Infinite mana creatures you control can produce
• Infinite untap of creatures you control