How can you create a combo with Havengul Lich, Krark-Clan Ironworks, Phyrexian Walker?
user
[START OF COMBO]This combo can be formed with Havengul Lich, Krark-Clan Ironworks, Phyrexian Walker

Color identity: UB
Mana cost: 
Steps:
  1. Activate Krark-Clan Ironworks by sacrificing Phyrexian Walker, adding {C}{C}.
  2. Activate Havengul Lich by paying {1}, targeting Phyrexian Walker.
  3. Cast Phyrexian Walker from graveyard by paying {0}.
  4. Repeat.[END OF COMBO STEPS]

Result:
  - Infinite colorless mana
  - Infinite death triggers
  - Infinite enters the battlefield
  - Infinite leaves the battlefield
  - Infinite sacrifice triggers
  - Infinite storm count[END OF COMBO RESULT][END OF COMBO]

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