How can you create a combo with Lithoform Engine, Tezzeret the Seeker, Mana Vault?
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[START OF COMBO]This combo can be formed with Lithoform Engine, Tezzeret the Seeker, Mana Vault

Color identity: U
Mana cost: 
Steps:
  1. Activate Tezzeret the Seeker's first ability by putting a loyalty counter on it.
  2. Holding priority, activate Mana Vault by tapping it, adding {C}{C}{C}.
  3. Activate Lithoform Engine's first ability by paying {2} and tapping it, copying Tezzeret the Seeker's ability, targeting Lithoform Engine and Mana Vault.
  4. Resolve the copy of Tezzeret the Seeker's ability, untapping Mana Vault and Lithoform Engine.
  5. Repeat from step 2.[END OF COMBO STEPS]

Result:
  - Infinite mana artifacts you control can produce
  - Infinite untap of artifacts you control[END OF COMBO RESULT][END OF COMBO]

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