Intruder Alarm, and Retraction Helix

Prerequisites

• Intruder Alarm on the battlefield
• Retraction Helix in hand
• You have a creature card in hand
• Creatures you control can tap to produce enough mana to cast the creature card
• You control at least one additional non-mana producing creature that does not have summoning sickness
• available

Steps

1. Cast Retraction Helix by paying , targeting any non-mana producing creature you control that does not have summoning sickness
2. Activate all mana-producing creatures you control by tapping them, adding at least
3. Cast the creature from your hand by paying its mana cost
4. When the creature enters the battlefield, Intruder Alarm triggers, untapping all creatures
5. Activate the creature targeted by Retraction Helix by tapping it, returning the creature cast in step 3 to your hand from the battlefield
6. Repeat from step 2

Results

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