Activate Perilous Forays by paying ({1} magic symbol) and sacrificing another creature, searching your library for a land with a basic land type and put it onto the battlefield.
When the land enters the battlefield, Lotus Cobra and Retreat to Emeria trigger.
Resolve the Lotus Cobra trigger, adding ({1} magic symbol) .
Resolve the Retreat to Emeria trigger, creating a 1/1 Kor Ally creature token.
Repeat.
Results
Put all lands with a basic land type from your library onto the battlefield tapped.