How can you create a combo with Hullbreaker Horror, Mana Vault?
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[START OF COMBO]This combo can be formed with Hullbreaker Horror, Mana Vault

Color identity: U
Mana cost: 
Steps:
  1. Activate Mana Vault by tapping it, adding {C}{C}{C}.
  2. Cast the permanent that can be cast using {C}{C} from your hand by paying its mana cost.
  3. Hullbreaker Horror triggers, returning Mana Vault from the battlefield to your hand.
  4. Cast Mana Vault by paying {1}.
  5. Hullbreaker Horror triggers, returning the permanent cast in step 2 from the battlefield to your hand.
  6. Repeat.
  7. If the permanent can be cast using {C} or less, this combo nets infinite colorless mana.[END OF COMBO STEPS]

Result:
  - Infinite colorless mana
  - Infinite storm count[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - All permanants must be on the battlefield
[END OF COMBO PREREQUISITES]
assistant