Kirol, Attentive First-Year, Conjurer's Closet, and Midnight Guard

Prerequisites

• Kirol, Attentive First-Year on the battlefield
• Conjurer's Closet on the battlefield
• Midnight Guard on the battlefield

Steps

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

Results

• Infinite ETB
• Infinite LTB