How can you create a combo with Emry, Lurker of the Loch, Chakram Retriever, Lotus Petal, Efficient Construction?
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[START OF COMBO]This combo can be formed with Emry, Lurker of the Loch, Chakram Retriever, Lotus Petal, Efficient Construction

Color identity: U
Mana cost: 
Steps:
  1. Activate Lotus Petal by tapping and sacrificing it, adding one mana of any color.
  2. Activate Emry by tapping it, targeting Lotus Petal.
  3. Cast Lotus Petal from your graveyard by paying {0}.
  4. Chakram Retriever and Efficient Construction both trigger.
  5. Resolve the Chakram Retriever trigger, untapping Emry.
  6. Resolve the Efficient Construction trigger, creating a 1/1 Thopter token.
  7. Lotus Petal resolves.
  8. Repeat.[END OF COMBO STEPS]

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

Other prerequisites:
  - All permanants must be on the battlefield
  - Emry does not have summoning sickness.
[END OF COMBO PREREQUISITES]
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