Xavier Sal, Infested Captain, Intruder Alarm, and First Day of Class

Prerequisites

• Xavier Sal, Infested Captain on the battlefield
• Intruder Alarm on the battlefield
• First Day of Class in hand
• There is at least one counter on a permanent you control
• You control at least one creature token
• available

Steps

1. Cast First Day of Class by paying
2. Activate Xavier Sal's first ability by tapping it and removing a counter from a permanent you control, creating a copy of any creature token you control
3. When the creature token enters the battlefield, Intruder Alarm and First Day of Class trigger
4. Resolve the Intruder Alarm trigger, untapping all creatures
5. Resolve the First Day of Class trigger, putting a +1/+1 counter on the creature token
6. Repeat

Results

• Infinite creature tokens
• Infinite ETB
• Infinite mana creatures you control can produce
• Infinite untap of all creatures
• Infinite creatures tokens with haste