Rootha, Mercurial Artist, Mana Echoes, and Electrodominance

Prerequisites

• Rootha, Mercurial Artist on the battlefield
• Mana Echoes on the battlefield
• Electrodominance in hand
• You control at least one other Orc and/or Shaman
• available

Steps

1. Cast Electrodominance by paying
2. Holding priority, activate Rootha by paying 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
5. Repeat from step 2
6. If you control two other Orcs and/or Shamans, this combo nets infinite colorless mana

Results

• Infinite colorless mana
• Infinite damage
• Infinite ETB
• Infinite LTB
• Infinite magecraft triggers
• Infinite storm count