Kirol, Attentive First-Year, Sunstrike Legionnaire, and Y'shtola Rhul

Prerequisites

• Kirol, Attentive First-Year on the battlefield
• Sunstrike Legionnaire on the battlefield
• Y'shtola Rhul on the battlefield

Steps

1. At the beginning of your end step, Y'shtola Rhul triggers
2. Holding priority, activate Kirol by tapping it and Sunstrike Legionnaire
3. copying Y'shtola Rhul's trigger, targeting Kirol
4. Resolve the copy of Y'shtola Rhul's trigger, blinking Kirol
5. When Kirol enters, Sunstrike Legionnaire triggers, untapping Sunstrike Legionnaire
6. Repeat from step 2

Results

• Infinite ETB
• Infinite LTB