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

Infinite storm count

Infinite mana lands you control can produce

Infinite green mana

Infinite magecraft triggers

Infinite landfall triggers

Toph, Hardheaded Teacher

Gaea's Cradle

Constant Mists

Spelunking

Activate Gaea's Cradle and another land by tapping them, adding at least {G}{G}{G}
Cast Constant Mists with buyback by paying {1}{G} and sacrificing a land that wasn't tapped for mana in step 1.
Toph's second ability triggers, earthbending Gaea's Cradle
Resolve Constant Mists, returning it to your hand.
Cast Constant Mists with buyback by paying {1}{G} and sacrificing Gaea's Cradle.
Toph triggers twice. Resolve the first trigger, earthbending another land you control.
Resolve the second Toph trigger, returning Gaea's Cradle from your graveyard to the battlefield tapped.
When Gaea's Cradle enters, Tiller Engine triggers, untapping Gaea's Cradle.
Resolve Constant Mists, returning it to your hand.
Activate Gaea's Cradle by tapping it, adding at least {G}{G}{G}.
Cast Constant Mists with buyback by paying {1}{G} and sacrificing the land that was earthbent in step 6.
Toph triggers twice. Resolve the first trigger, earthbending Gaea's Cradle.
Resolve the second Toph trigger, returning the sacrificed land from your graveyard to the battlefield tapped.
When the land enters, Tiller Engine triggers, untapping the land.
Resolve Constant Mists, returning it to your hand.
Activate the land that entered by tapping it adding at least {1}.
Repeat from step 5.

Tiller Engine

Combos with "Toph, Hardheaded Teacher"