Kirol, Attentive First-Year, Felidar Guardian, and Sunstrike Legionnaire

Prerequisites

• Kirol, Attentive First-Year on the battlefield
• Felidar Guardian on the battlefield
• Sunstrike Legionnaire on the battlefield
• available

Steps

1. Cast Felidar Guardian by paying
2. When Felidar Guardian enters, it and Sunstrike Legionnaire trigger
3. Resolve the Sunstrike Legionnaire trigger, untapping it
4. Holding priority, activate Kirol by tapping it and Sunstrike Legionnaire
5. copying Felidar Guardian's trigger, targeting Kirol
6. Resolve the copy of Felidar Guardian's trigger, blinking Kirol
7. When Kirol enters, Sunstrike Legionnaire triggers, untapping Sunstrike Legionnaire
8. Repeat from step 4

Results

• Infinite ETB
• Infinite LTB