Molten Echoes, and Nova Chaser

Prerequisites

• Molten Echoes on the battlefield
• Nova Chaser in hand
• available

Steps

1. Cast Nova Chaser by paying its mana cost
2. When Nova Chaser enters the battlefield, its champion ability and Molten Echoes triggers
3. Resolve the Molten Echoes trigger, creating a token copy of Nova Chaser with haste
4. When the Nova Chaser token enters the battlefiled, its champion ability triggers, exiling the nontoken Nova Chaser until the token Nova Chaser leaves the battlefield
5. Resolve the champion ability from step 2, exiling the token Nova Chaser
6. The token Nova Chaser leaves the battlefield, returning the nontoken Nova Chaser from exile to the battlefield
7. Repeat from step 2

Results

• Infinite LTB
• Infinite ETB