Invasion of Segovia // Caetus, Sea Tyrant of Segovia, Intruder Alarm, and Lab Rats

Prerequisites

• Invasion of Segovia // Caetus, Sea Tyrant of Segovia on the battlefield
• Intruder Alarm on the battlefield
• Lab Rats in hand
• Sea Tyrant of Segovia
• You control at least five untapped creatures, one of which must be black

Steps

1. Cast Lab Rats with buyback by tapping five creatures you control, one of which must be black
2. Resolve Lab Rats, creating a 1/1 Rat creature token and returning Lab Rats to your hand
3. When the Rat enters the battlefield, Intruder Alarm triggers, untapping all creatures
4. Repeat

Results

• Infinite creature tokens
• Infinite ETB
• Infinite magecraft triggers
• Infinite mana creatures you control can produce
• Infinite storm count
• Infinite untap of all creatures