How can you create a combo with Soul of Zendikar, Mana Echoes, Chromatic Orrery?
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[START OF COMBO]This combo can be formed with Soul of Zendikar, Mana Echoes, Chromatic Orrery

Color identity: RG
Mana cost: 
Steps:
  1. Activate Chromatic Orrery's first ability by tapping it, adding {5}.
  2. Activate Soul of Zendikar's first ability by paying {5}, creating a 3/3 Beast creature token.
  3. The Beast enters the battlefield, triggering Mana Echoes, adding at least {C}{C}{C}{C}{C}.
  4. Repeat from step 2.[END OF COMBO STEPS]

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

Other prerequisites:
  - All permanants must be on the battlefield
  - You control at least four Beasts.
[END OF COMBO PREREQUISITES]
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