Saw in Half + Sacrifice + Mnemonic Wall
Saw in Half
Sacrifice
Mnemonic Wall
Requires
Saw in Half must be in hand.
Sacrifice must be in hand, or in the graveyard.
Mnemonic Wall must be on the battlefield.
Mana needed: 
Steps
- Cast Saw in Half by paying , destroying Mnemonic Wall 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.
- The two Mnemonic Wall tokens enter the battlefield, returning Sacrifice, if applicable, and Saw in Half from your graveyard to your hand.
- Cast Sacrifice by paying and sacrificing a Mnemonic Wall token, adding .
- Repeat.
- 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 Mnemonic Wall 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.
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