Aminatou, the Fateshifter, Heart of Kiran, and Angel of Indemnity

Prerequisites

• Aminatou, the Fateshifter on the battlefield
• Heart of Kiran on the battlefield
• Angel of Indemnity on the battlefield

Steps

1. If Aminatou has two or more loyalty counters on it, activate Heart of Kiran by removing a loyalty counter from Aminatou, causing Heart of Kiran to become an artifact creature until end of turn
2. Repeat step 1 until Aminatou has one loyalty counter on it
3. Activate Aminatou's second loyalty ability by removing a loyalty counter from it, targeting Angel of Indemnity
4. Aminatou is put into your graveyard as a state-based action due to having zero loyalty
5. Resolve the Aminatou ability, blinking Angel of Indemnity
6. When Angel of Indemnity enters the battlefield, it triggers, returning Aminatou from your graveyard to the battlefield
7. Repeat

Results

• Infinite LTB
• Infinite ETB