Gretchen Titchwillow, Oboro Breezecaller, Simic Growth Chamber, and Zirda, the Dawnwaker

Prerequisites

• Gretchen Titchwillow on the battlefield
• Oboro Breezecaller on the battlefield
• Simic Growth Chamber on the battlefield
• Zirda, the Dawnwaker on the battlefield

Steps

1. Activate another land that enters untapped by tapping it, adding at least
2. Activate Oboro Breezecaller by paying due to Zirda and returning the land tapped in step 2 from the battlefield to your hand, untapping Simic Growth Chamber
3. Activate Simic Growth Chamber by tapping it, adding
4. Activate Gretchen by paying due to Zirda, causing you to draw a card and put the land returned to hand in step 2 onto the battlefield
5. Repeat

Results

• Infinite card draw
• Infinite draw triggers
• Near-infinite landfall triggers