Gretchen Titchwillow, Gaea's Cradle, Talon Gates of Madara, and Cloudstone Curio

Prerequisites

• Gretchen Titchwillow on the battlefield
• Gaea's Cradle on the battlefield
• Talon Gates of Madara in hand
• Cloudstone Curio on the battlefield

Steps

1. Activate Gaea's Cradle by tapping it, adding at least eight
2. Activate Talon Gates of Madara by paying , putting it from your hand onto the battlefield
3. When Talon Gates of Madara enters, it and Cloudstone Curio trigger
4. Resolve the Talon Gates of Madara trigger, optionally phasing out a creature
5. Resolve the Cloudstone Curio trigger, returning Gaea's Cradle from the battlefield to your hand
6. Activate Talon Gates of Madara's second ability by paying and tapping it, adding
7. Activate Gretchen by paying , causing you to draw a card and put Gaea's Cradle from your hand onto the battlefield
8. When Gaea's Cradle enters, Cloudstone Curio triggers, returning Talon Gates of Madara from the battlefield to your hand
9. Repeat

Results

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