Kirol, Attentive First-Year, Genesis Chamber, and Felidar Guardian

Prerequisites

• Kirol, Attentive First-Year on the battlefield
• Genesis Chamber on the battlefield
• Felidar Guardian on the battlefield
• available

Steps

1. Cast Felidar Guardian by paying
2. When Felidar Guardian enters, it and Genesis Chamber trigger
3. Resolve the Genesis Chamber trigger, creating a 1/1 Myr artifact creature token
4. Holding priority, activate Kirol by tapping it and the Myr, copying Felidar Guardian's trigger, targeting Kirol
5. Resolve the copy of Felidar Guardian's trigger, blinking Kirol
6. When Kirol enters, Genesis Chamber triggers, creating a 1/1 Myr artifact creature token
7. Repeat from step 4

Results

• Infinite ETB
• Infinite LTB
• Infinite tapped creature tokens