You control a land that can tap to produce at least ({G} magic symbol) .
Fertilid has at least one +1/+1 counter on it.
Stone-Seeder Hierophant does not have summoning sickness.
Mana Needed
({1} magic symbol) available.
Steps
Activate a mana-producing land by tapping it, adding at least ({G} magic symbol) .
Activate
Stone-Seeder Hierophant by tapping it, untapping the land.
Activate
Fertilid by paying ({1} magic symbol) ({G} magic symbol) and removing a +1/+1 counter from it, causing you to search your library for a basic land card and put it onto the battlefield tapped.
When the basic land enters the battlefield,
Tiller Engine and
Retreat to Kazandu trigger.
Resolve the
Tiller Engine trigger, untapping the basic land.
Resolve the
Retreat to Kazandu trigger, putting a +1/+1 counter on
Fertilid.
Activate the basic land by tapping it, adding ({1} magic symbol) .
Repeat.
Results
Put all basic lands from your library onto the battlefield.