Boommobile, and Deadeye Navigator

Prerequisites

• Boommobile on the battlefield
• Deadeye Navigator on the battlefield
• available

Steps

1. Activate Boommobile's crew ability by tapping Deadeye Navigator, causing Boommobile to become a creature until end of turn
2. Activate Deadeye Navigator by paying , blinking it
3. When Deadeye Navigator enters, its soulbond ability triggers, pairing it and Boommobile
4. Activate Boommobile by paying , blinking it
5. When Boommobile enters, it triggers, adding that can only be spent to activate abilities
6. Repeat

Results

• Infinite ETB
• Infinite LTB