Myojin of Cryptic Dreams, and Huatli's Raptor

Prerequisites

• Myojin of Cryptic Dreams on the battlefield
• Huatli's Raptor in hand
• Myojin of Cryptic Dreams has at least two indestructible counters on it
• available

Steps

1. Cast Huatli's Raptor by paying its mana cost
2. Holding priority, activate Myojin by removing an indestructible counter from it, copying the Huatli's Raptor spell three times
3. Resolve the first Huatli's Raptor spell
4. When the Huatli's Raptor token enters the battlefield, it triggers, putting an indestructible counter on Myojin
5. Repeat from step 2

Results

• Infinite ETB
• Infinite creature tokens
• Infinite proliferate
• Infinite copies of any permanent spells you control