Saw in Half, Sacrifice, and Shipwreck Dowser

Prerequisites

• Saw in Half in hand
• Sacrifice in hand or in the graveyard
• Shipwreck Dowser on the battlefield
• available

Steps

1. Cast Saw in Half by paying , 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 and sacrificing a Shipwreck Dowser token, adding
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

Results

• Infinite black mana
• Infinite casts of instants and sorceries in your graveyard that can be cast using only black mana
• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite magecraft triggers
• Infinite sacrifice triggers
• Infinite storm count