You control a Plains or have a Plains in your graveyard.
Steps
Activate
Zuran Orb by sacrificing a land.
Repeat step 1 until you control no lands.
Activate
Blasting Station by tapping it and sacrificing
World Shaper.
When
World Shaper dies, it triggers, return all lands from your graveyard to the battlefield tapped.
When the lands enter,
Emeria Shepherd triggers that many times.
Resolve an
Emeria Shepherd trigger that was triggered by a Plains, returning
World Shaper from your graveyard to the battlefield.
When
World Shaper enters,
Blasting Station triggers, untapping
Blasting Station.
Resolve all remaining
Emeria Shepherd triggers.
Resolve the
Blasting Station ability from step 3.
Repeat.
Notes
You can return all nonland permanents in your graveyard and library to the battlefield if you control there are two or more Plains between your graveyard, library and battlefield. To do this, have all triggers from
Emeria Shepherd target desired permanents. Then, resolve the Plains triggers first to return those cards to the battlefield, causing all other triggers to fizzle on the stack.
Results
Infinite LTB.
Infinite ETB.
Infinite sacrifice triggers.
Infinite death triggers.
Infinite self-mill.
Infinite damage.
Infinite lifegain triggers.
Infinite lifegain.
Infinite landfall triggers.
Return all nonland permanents from your graveyard to the battlefield.