Emiel the Blessed, Deceiver Exarch, and Serra's Sanctum

Prerequisites

• Emiel the Blessed on the battlefield
• Deceiver Exarch on the battlefield
• Serra's Sanctum on the battlefield
• You control at least four enchantments

Steps

1. Activate Serra's Sanctum by tapping it, adding at least
2. Activate Emiel by paying , blinking Deceiver Exarch
3. When Deceiver Exarch enters the battlefield, it triggers, untapping Serra's Sanctum
4. Repeat

Results

• Infinite blinking
• Infinite ETB
• Infinite LTB
• Infinite mana permanents you control can produce
• Infinite untap of permanents you control