Infinite ETB, Infinite creature tokens, Infinite copies of creature tokens you control, Infinite untap of creatures, Infinite mana creatures you control can produce, Infinite untap of creatures you control
Activate Xavier Sal by tapping it and removing a counter from a permanent you control, creating a copy of an artifact creature token you control.
When the creature token enters the battlefield, Intruder Alarm and Serum Tank trigger.
Resolve the Intruder Alarm trigger, untapping all creatures.
Resolve the Serum Tank trigger, putting a counter on it.
Repeat.
Component Cards
How It Works
Activate Xavier Sal by tapping it and removing a counter from a permanent you control, creating a copy of an artifact creature token you control.
When the creature token enters the battlefield, Intruder Alarm and Serum Tank trigger.
Resolve the Intruder Alarm trigger, untapping all creatures.
Resolve the Serum Tank trigger, putting a counter on it.
Repeat.