Jan Jansen, Chaos Crafter, and Intruder Alarm

Prerequisites

• Jan Jansen, Chaos Crafter on the battlefield
• Intruder Alarm on the battlefield
• You control a noncreature artifact

Steps

1. Activate Jan Jansen's second ability by tapping it and sacrificing the noncreature artifact, creating two 1/1 Construct creature tokens
2. The Constructs enter the battlefield, triggering Intruder Alarm twice
3. Resolve the first trigger, untapping all creatures
4. Activate Jan Jansen's first ability by tapping it and sacrificing a Construct, creating two Treasure tokens
5. Resolve the second Intruder Alarm trigger from step 2, untapping all creatures
6. Repeat

Results

• Infinite colored mana
• Infinite creature tokens
• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite mana creatures you control can produce
• Infinite sacrifice triggers
• Infinite Treasure tokens
• Infinite untap of all creatures