How can you create a combo with Rootha, Mercurial Artist, Mana Echoes, Electrodominance?
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[START OF COMBO]This combo can be formed with Rootha, Mercurial Artist, Mana Echoes, Electrodominance

Color identity: UR
Mana cost: {5}{R}{R}
Steps:
  1. Cast Electrodominance by paying {3}{R}{R}.
  2. Holding priority, activate Rootha by paying {2} and returning it to your hand, copying Electrodominance.
  3. Resolve the copy of Electrodominance, dealing 3 damage to any target and casting Rootha without paying its mana cost.
  4. Rootha enters the battlefield, triggering Mana Echoes, adding at least {C}{C}.
  5. Repeat from step 2.
  6. If you control two other Orcs and/or Shamans, this combo nets infinite colorless mana.[END OF COMBO STEPS]

Result:
  - Infinite colorless mana
  - Infinite damage
  - Infinite enters the battlefield
  - Infinite leaves the battlefield
  - Infinite magecraft triggers
  - Infinite storm count[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - Rootha, Mercurial Artist must be on the battlefield
  - Mana Echoes must be on the battlefield
  - Electrodominance must be in your hand
  - You control at least one other Orc and/or Shaman.
[END OF COMBO PREREQUISITES]
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