Myojin of Cryptic Dreams, and Kiora's Dambreaker

Prerequisites

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

Steps

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

Results

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