Aminatou, the Fateshifter, Emeria Shepherd, and Heart of Kiran

Prerequisites

• Aminatou, the Fateshifter on the battlefield
• Emeria Shepherd on the battlefield
• Heart of Kiran on the battlefield
• You control a Plains

Steps

1. Activate the Plains by tapping it, adding
2. Activate Aminatou's second loyalty ability by removing a loyalty counter from it, targeting the Plains
3. 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
4. Repeat step 3 until Aminatou dies as a state-based aciton due to having zero loyalty
5. Resolve the Aminatou ability from step 2, blinking the Plains
6. The Plains enters the battlefield, triggering Emeria Shepherd, returning Aminatou from your graveyard to the battlefield
7. Repeat

Results

• Infinite landfall triggers
• Infinite white mana