Aminatou, the Fateshifter, Teferi, Master of Time, Ajani Steadfast, and Contagion Engine

Prerequisites

• Aminatou, the Fateshifter on the battlefield
• Teferi, Master of Time on the battlefield
• Ajani Steadfast on the battlefield
• Contagion Engine on the battlefield
• Teferi has at least eight loyalty counters on it
• each turn available

Steps

1. Activate Contagion Engine by paying and tapping it, putting two loyalty counters on each planeswalker you control
2. Activate Ajani's second loyalty ability by removing two loyalty counters from it, putting a loyalty counter on each other planeswalker you control
3. Activate Teferi's third loyalty ability by removing ten loyalty counters from it, causing you to take two extra turns after this one
4. Activate Aminatou's second loyalty ability by removing a loyalty counter from it, blinking Teferi
5. Activate Teferi's first loyalty ability by putting a loyalty counter on it, causing you to loot
6. Move to your first extra turn
7. Activate Teferi's first loyalty ability by putting a loyalty counter on it, causing you to loot
8. Repeat steps 1 and 2 one additional time
9. Move to your second extra turn
10. Repeat

Results

• Infinite turns