Rograkh, Son of Rohgahh, Vedalken Mastermind, Intruder Alarm, Dual Nature, and Phyrexian Altar

Prerequisites

• Rograkh, Son of Rohgahh in hand
• Vedalken Mastermind on the battlefield
• Intruder Alarm on the battlefield
• Dual Nature on the battlefield
• Phyrexian Altar on the battlefield
• Vedalken Mastermind does not have summoning sickness

Steps

1. Cast Rograkh by paying
2. When Rograkh enters the battlefield, Intruder Alarm and Dual Nature's first ability triggers
3. Resolve the Intruder Alarm trigger, untapping all creatures
4. Resolve the Dual Nature trigger, creating a token copy of Rograkh
5. Activate Phyrexian Altar by sacrificing the Rograkh token, adding
6. Activate Vedalken Mastermind by paying and tapping it, returning Rograkh to your hand from the battlefield
7. Dual Nature's second ability triggers, exiling nothing
8. Repeat

Results

• Infinite ETB
• Infinite LTB
• Infinite mana creatures you control can produce
• Infinite storm count
• Infinite untap of all creatures