Stone-Seeder Hierophant does not have summoning sickness.
({1} magic symbol) available.
Steps
Activate Thawing Glaciers by paying ({1} magic symbol) and tapping it, searching your library for a basic land card and putting it onto the battlefield tapped.
The land enters the battlefield, triggering Nissa and Stone-Seeder Hierophant.
Resolve the Nissa trigger, adding ({1} magic symbol) .
Resolve the Stone-Seeder Hierophant trigger, untapping it.
Activate Stone-Seeder Hierophant by tapping it, untapping Thawing Glaciers.
Repeat.
Results
Near-infinite landfall triggers.
Put all basic lands from your library onto the battlefield tapped.