Perilous Forays by paying ({1} magic symbol) and sacrificing a creature you control, searching your library for a land card with a basic land type and putting it on the battlefield tapped.
When the land enters the battlefield,
Retreat to Emeria and
Amulet of Vigor trigger.
Resolve the
Retreat to Emeria trigger, creating a creature token.
Resolve the
Amulet of Vigor trigger, untapping the land.
Activate the land by tapping it, adding ({1} magic symbol) .
Repeat.
Results
Put all lands with a basic land type from your library onto the battlefield tapped.