How can you create a combo with Zirda, the Dawnwaker, Omen Hawker, Crab Umbra?
user
[START OF COMBO]This combo can be formed with Zirda, the Dawnwaker, Omen Hawker, Crab Umbra

Color identity: URW
Mana cost: 
Steps:
  1. Activate Omen Hawker by tapping it, adding {C}{U} that can only be spent to activate abilities.
  2. Activate Crab Umbra by paying {U}, untapping Omen Hawker.
  3. Repeat.[END OF COMBO STEPS]

Result:
  - Infinite colorless mana that can only be spent to activate abilities[END OF COMBO RESULT][END OF COMBO]

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