Activate the Plains by tapping it, adding ({W} magic symbol) .
Activate Aminatou's second loyalty ability by removing a loyalty counter from it, targeting the Plains.
Holding priority, activate Heart of Kiran's crew ability by removing a loyalty counter from Aminatou, causing Heart of Kiran to become an artifact creature until end of turn.
Repeat step 3 until Aminatou dies as a state-based aciton due to having zero loyalty.
Resolve the Aminatou ability from step 2, blinking the Plains.
The Plains enters the battlefield, triggering Emeria Shepherd, returning Aminatou from your graveyard to the battlefield.