How can you create a combo with Phyrexian Unlife, Soul Conduit, Cavern Harpy?
user
[START OF COMBO]This combo can be formed with Phyrexian Unlife, Soul Conduit, Cavern Harpy

Color identity: WUB
Mana cost: {6}
Steps:
  1. Activate Cavern Harpy by paying 1 life.
  2. Repeat step 1 until you have zero life.
  3. Resolve the last Cavern Harpy trigger, returning it to your hand.
  4. The remaining Cavern Harpy triggers fizzle.
  5. Activate Soul Conduit by paying {6} and tapping it, exchanging your life total with an opponent's.
  6. The opponent loses the game due to having zero life.
  7. You may repeat this on each of your turns.[END OF COMBO STEPS]

Result:
  - Target player loses the game on each of your turns[END OF COMBO RESULT][END OF COMBO]

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