Kirol, Attentive First-Year, Wispweaver Angel, and Midnight Guard

Prerequisites

• Kirol, Attentive First-Year on the battlefield
• Wispweaver Angel in hand
• Midnight Guard on the battlefield
• available

Steps

1. Cast Wispweaver Angel by paying its mana cost
2. When Wispweaver Angel enters, it and Midnight Guard trigger
3. Resolve the Midnight Guard trigger, untapping it
4. Holding priority, activate Kirol by tapping it and Midnight Guard
5. copying Wispweaver Angel's trigger, targeting Kirol
6. Resolve the copy of Wispweaver Angel's trigger, blinking Kirol
7. When Kirol enters, Midnight Guard triggers, untapping Midnight Guard
8. Repeat from step 4

Results

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