How can you create a combo with Molten Echoes, Changeling Berserker?
user
[START OF COMBO]This combo can be formed with Molten Echoes, Changeling Berserker

Color identity: R
Mana cost: {3}{R}
Steps:
  1. Cast Changeling Berserker by paying {3}{R}.
  2. Changeling Berserker enters the battlefield, triggering itself and Molten Echoes.
  3. Resolve the Molten Echoes trigger, creating a token copy of Changeling Berserker.
  4. The Changeling Berserker token enters the battlefield, triggering itself, exiling the nontoken Changeling Berserker.
  5. When the nontoken Changeling Berserker leaves the battlefield, it triggers itself, having no effect since no card was exiled.
  6. Resolve the Changeling Berserker trigger from step 2, exiling the token Changeling Berserker.
  7. When the token Changeling Berserker leaves the battlefield, it triggers itself, returning the nontoken Changeling Berserker from exile to the battlefield.
  8. Repeat from step 2.[END OF COMBO STEPS]

Result:
  - Infinite enters the battlefield
  - Infinite leaves the battlefield[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - Molten Echoes must be on the battlefield
  - Changeling Berserker must be in your hand
  - Any creature type chosen with Molten Echoes.
[END OF COMBO PREREQUISITES]
assistant