How can you create a combo with Rowan, Scion of War, Exsanguinate, Necropotence?
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[START OF COMBO]This combo can be formed with Rowan, Scion of War, Exsanguinate, Necropotence

Color identity: BR
Mana cost: {B}{B}
Steps:
  1. Activate Necropotence by paying 1 life, exiling the top card of your library.
  2. Repeat step 1 until you have paid an amount of life equal to the highest life total among your opponents.
  3. Activate Rowan by tapping it, reducing the cost of all black and/or red spells you cast this turn.
  4. Cast Exsanguinate, choosing for X to equal the amount of life you've lost this turn, but paying a total of {B}{B} due to Rowan's ability.
  5. Resolve Exsanguinate, causing each opponent to lose X life, and you to gain life equal to the life lost this way.
  6. Each opponent loses the game due to having 0 or less life.[END OF COMBO STEPS]

Result:
  - Each opponent loses the game
  - Near-infinite lifegain
  - Near-infinite lifeloss[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - Rowan, Scion of War must be on the battlefield
  - Exsanguinate must be in your hand
  - Necropotence must be on the battlefield
  - Rowan does not have summoning sickness.
  - You have the highest life total.
[END OF COMBO PREREQUISITES]
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