How can you create a combo with The Master, Multiplied, Omarthis, Ghostfire Initiate, Echoes of Eternity?
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[START OF COMBO]This combo can be formed with The Master, Multiplied, Omarthis, Ghostfire Initiate, Echoes of Eternity

Color identity: BR
Mana cost: {2}
Steps:
  1. Cast Omarthis by paying {2}.
  2. Echoes of Eternity triggers, copying the Omarthis spell.
  3. Resolve the copy of the Omarthis spell, creating a token copy of Omarthis with one +1/+1 counter on it.
  4. Resolve the original Omarthis spell, causing it to enter the battlefield with one +1/+1 counter on it.
  5. The token Omarthis's first ability triggers twice.
  6. Resolve the first trigger, putting a +1/+1 counter on the token Omarthis.
  7. The nontoken Omarthis's first ability triggers twice.
  8. Resolve the first trigger, putting a +1/+1 counter on the nontoken Omarthis.
  9. Repeat from step 5.[END OF COMBO STEPS]

Result:
  - Infinite +1/+1 counters on a creature token
  - Infinite +1/+1 counters on Omarthis[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - The Master, Multiplied must be on the battlefield
  - Omarthis, Ghostfire Initiate must be in your hand
  - Echoes of Eternity must be on the battlefield
[END OF COMBO PREREQUISITES]
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