Saw in Half + Sacrifice + Mnemonic Wall

Saw in Half

Sacrifice

Mnemonic Wall

How it works

1. Cast Saw in Half by paying 2, 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.
2. The two Mnemonic Wall 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 Mnemonic Wall 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 Mnemonic Wall tokens to get infinite casts of those instants and/or sorceries.