How can you create a combo with Trench Behemoth, Fastbond, Plaza of Harmony?
user
[START OF COMBO]This combo can be formed with Trench Behemoth, Fastbond, Plaza of Harmony

Color identity: GU
Mana cost: 
Steps:
  1. Activate Trench Behemoth by returning Plaza of Harmony from the battlefield to your hand, untapping it.
  2. Play Plaza of Harmony, triggering it and Fastbond.
  3. Resolve the Plaza of Harmony trigger, causing you to gain 3 life.
  4. Resolve the Fastbond trigger, dealing 1 damage to you.
  5. Activate Plaza of Harmony by tapping it, adding either {C} or one mana of any type a Gate you control could produce.
  6. Repeat.[END OF COMBO STEPS]

Result:
  - Infinite colorless mana
  - Infinite landfall triggers
  - Infinite lifegain
  - Infinite lifegain triggers
  - Infinite mana Gates you control can produce[END OF COMBO RESULT][END OF COMBO]

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