How can you create a combo with Myr Matrix, Mana Echoes?
user
[START OF COMBO]This combo can be formed with Myr Matrix, Mana Echoes

Color identity: R
Mana cost: {5}
Steps:
  1. Activate Myr Matrix by paying {5}, creating a 1/1 Myr creature token.
  2. The Myr enters the battlefield, triggering Mana Echoes, adding at least {C}{C}{C}{C}{C}.
  3. Repeat.[END OF COMBO STEPS]

Result:
  - Infinite colorless mana
  - Infinite creature tokens
  - Infinite enters the battlefield[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - All permanants must be on the battlefield
  - You control at least four Myrs.
[END OF COMBO PREREQUISITES]
assistant