Activate Perilous Forays by paying ({1} magic symbol) and sacrificing a creature, causing you to search your library for a land card with a basic land type and put it onto the battlefield tapped.
When the land enters the battlefield Tireless Provisioner and Retreat to Emeria trigger.
Resolve the Tireless Provisioner trigger, creating a Treasure token.
Activate the Treasure by tapping and sacrificing it, adding ({1} magic symbol) .
Resolve the Retreat to Emeria trigger, creating a creature token.
Repeat.
Results
Put all lands with a basic land type from your library onto the battlefield tapped.