How can you create a combo with Saw in Half, Sacrifice, Shipwreck Dowser?
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[START OF COMBO]This combo can be formed with Saw in Half, Sacrifice, Shipwreck Dowser

Color identity: UB
Mana cost: {2}{B}{B}
Steps:
  1. Cast Saw in Half by paying {2}{B}, destroying Shipwreck Dowser and creating two token copies of it with base power equal to half the destroyed creature's power and base toughness equal to half the destroyed creature's toughness, rounding up each time.
  2. The two Shipwreck Dowser tokens enter the battlefield, returning Sacrifice, if applicable, and Saw in Half from your graveyard to your hand.
  3. Cast Sacrifice by paying {B} and sacrificing a Shipwreck Dowser token, adding {B}{B}{B}{B}{B}.
  4. Repeat.
  5. Once you have infinite mana, you may instead return any other instant or sorcery that can be cast using only black mana in place of Sacrifice using the Shipwreck Dowser tokens to get infinite casts of those instants and/or sorceries.[END OF COMBO STEPS]

Result:
  - Infinite black mana
  - Infinite casts of instants and sorceries in your graveyard that can be cast using only black mana
  - Infinite death triggers
  - Infinite enters the battlefield
  - Infinite leaves the battlefield
  - Infinite magecraft triggers
  - Infinite sacrifice triggers
  - Infinite storm count[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - Saw in Half must be in your hand
  - Sacrifice must be in your hand or in the graveyard
  - Shipwreck Dowser must be on the battlefield
[END OF COMBO PREREQUISITES]
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