Elvish Piper, Intruder Alarm, and Vedalken Mastermind

Prerequisites

• Elvish Piper on the battlefield
• Intruder Alarm on the battlefield
• Vedalken Mastermind on the battlefield
• You have a creature card in hand
• Elvish Piper and Vedalken Mastermind do not have summoning sickness
• Creatures you control can tap to produce at least

Steps

1. Activate any number of creatures you control by tapping it, adding at least
2. Activate Elvish Piper by paying and tapping it, putting any creature card from your hand onto the battlefield
3. The creature enters the battlefield, triggering Intruder Alarm, untapping all creatures
4. Activate Vedalken Mastermind by paying and tapping it, returning a creature card from the battlefield to your hand
5. Repeat

Results

• Infinite blinking
• Infinite ETB
• Infinite LTB
• Infinite mana creatures you control can produce
• Infinite untap of creatures you control