Felidar Guardian, Spark Double, and Panharmonicon

Prerequisites

• Felidar Guardian on the battlefield
• Spark Double in hand
• Panharmonicon on the battlefield
• available

Steps

1. Cast Spark Double having it enter as a copy of Felidar Guardian
2. It enters and blinks Felidar and a land
3. Tap the land for mana
4. Felidar Guardian enters blinking a land and Spark Double
5. Tap the land
6. Repeat

Results

• Infinite blinking
• Infinite colored mana
• Infinite ETB
• Infinite landfall triggers
• Infinite LTB