Toph, Hardheaded Teacher, Gaea's Cradle, Constant Mists, and Spelunking

Prerequisites

• Toph, Hardheaded Teacher on the battlefield
• Gaea's Cradle on the battlefield
• Constant Mists in hand
• Spelunking on the battlefield

Steps

1. Activate Gaea's Cradle and another land by tapping them, adding at least Cast Constant Mists with buyback by paying and sacrificing a land that wasn't tapped for mana in step 1
2. Toph's second ability triggers, earthbending Gaea's Cradle Resolve Constant Mists, returning it to your hand
3. Cast Constant Mists with buyback by paying and sacrificing Gaea's Cradle
4. Toph triggers twice
5. Resolve the first trigger, earthbending another land you control
6. Resolve the second Toph trigger, returning Gaea's Cradle from your graveyard to the battlefield untapped due to Spelunking Resolve Constant Mists, returning it to your hand
7. Activate Gaea's Cradle by tapping it, adding at least
8. Cast Constant Mists with buyback by paying and sacrificing the land that was earthbent in step 6
9. Toph triggers twice
10. Resolve the first trigger, earthbending Gaea's Cradle
11. Resolve the second Toph trigger, returning the sacrificed land from your graveyard to the battlefield untapped due to Spelunking
12. Resolve Constant Mists, returning it to your hand
13. Activate the land that entered by tapping it adding at least
14. Repeat from step 5

Results

• Infinite storm count
• Infinite mana lands you control can produce
• Infinite green mana
• Infinite magecraft triggers
• Infinite landfall triggers