Molten Echoes, and Thoughtweft Trio

Prerequisites

• Molten Echoes on the battlefield
• Thoughtweft Trio in hand
• available

Steps

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

Results

• Infinite LTB
• Infinite ETB