Toph, the First Metalbender, Haru, Hidden Talent, Inquisitive Puppet, and Rukarumel, Biologist

Prerequisites

• Toph, the First Metalbender on the battlefield
• Haru, Hidden Talent on the battlefield
• Inquisitive Puppet in hand
• Rukarumel, Biologist on the battlefield
• available

Steps

1. Cast Inquisitive Puppet by paying
2. When Inquisitive Puppet enters as an Ally due to Rukarumel, it and Haru trigger
3. Resolve the Inquisitve Puppet trigger, causing you to scry 1
4. Resolve the Haru trigger, earthbending Inquisitive Puppet as it's a land due to Toph
5. Activate Inquisitive Puppet by exiling it
6. Toph triggers, returning Inquisitve Puppet from exile to the battlefield tapped
7. Repeat steps 2 through 4 once
8. Resolve the Inquisitive Puppet ability from step 5, creating a 1/1 Soldier creature token
9. Repeat from step 5

Results

• Infinite LTB
• Infinite ETB
• Infinite creature tokens
• Infinite landfall triggers