How can you create a combo with Havengul Lich, Rooftop Storm, Warren Soultrader, Vein Ripper?
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[START OF COMBO]This combo can be formed with Havengul Lich, Rooftop Storm, Warren Soultrader, Vein Ripper

Color identity: UB
Mana cost: {1}
Steps:
  1. Activate Havengul Lich by paying {1}, allowing you to cast a Zombie from your graveyard this turn.
  2. Cast the Zombie from your graveyard by paying {0} due to Rooftop Storm.
  3. Activate Warren Soultrader by paying 1 life and sacrificing the Zombie.
  4. When the Zombie dies, Vein Ripper triggers, causing you to gain 2 life and an opponent to lose 2 life.
  5. Resolve the Warren Soultrader ability, creating a Treasure token.
  6. Activate the Treasure by tapping and sacrificing it, adding {1}.
  7. Repeat.[END OF COMBO STEPS]

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

Other prerequisites:
  - All permanants must be on the battlefield
  - Your life total is at least 2.
[END OF COMBO PREREQUISITES]
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