Kirol, Attentive First-Year, Sunstrike Legionnaire, and Airbender Ascension

Prerequisites

• Kirol, Attentive First-Year on the battlefield
• Sunstrike Legionnaire on the battlefield
• Airbender Ascension on the battlefield

Steps

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

Results

• Infinite ETB
• Infinite LTB
• Infinite mana creatures you control can produce
• Infinite untap of creatures you control