Myojin of Cryptic Dreams, and Gulping Scraptrap

Prerequisites

• Myojin of Cryptic Dreams on the battlefield
• Gulping Scraptrap in hand
• Myojin of Cryptic Dreams has at least two indestructible counters on it
• available

Steps

1. Cast Gulping Scraptrap by paying its mana cost
2. Holding priority, activate Myojin by removing an indestructible counter from it, copying the Gulping Scraptrap spell three times
3. Resolve the first Gulping Scraptrap spell
4. When the Gulping Scraptrap 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