How can you create a combo with Machine God's Effigy, Horseshoe Crab, Mesmeric Orb?
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[START OF COMBO]This combo can be formed with Machine God's Effigy, Horseshoe Crab, Mesmeric Orb

Color identity: U
Mana cost: {4}
Steps:
  1. Cast Machine God's Effigy by paying {4}, choosing to have it enter the battlefield as a copy of Horseshoe Crab that is an artifact.
  2. Activate Machine God's Effigy by tapping it, adding {U}.
  3. Activate Machine God's Effigy by paying {U}, untapping it.
  4. Mesemeric Orb triggers, causing you to mill a card.
  5. Repeat from step 2.[END OF COMBO STEPS]

Result:
  - Infinite self-mill[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - Machine God's Effigy must be in your hand
  - Horseshoe Crab must be on the battlefield
  - Mesmeric Orb must be on the battlefield
[END OF COMBO PREREQUISITES]
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