Activate Ashnod's Altar by sacrificing another nontoken creature, adding ({C} magic symbol) ({C} magic symbol) .
Activate Cormela by paying ({1} magic symbol) and tapping it, adding ({U} magic symbol) ({B} magic symbol) ({R} magic symbol) that can only be spent to cast instant and/or sorcery spells.
Cast Saw in Half by paying ({2} magic symbol) ({B} magic symbol) , destroying Cormela 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.
Put one of the Cormela tokens into your graveyard due to the legend rule.
The Cormela that died in step 3 and the Cormela that died in step 4 each trigger, returning Victimize and Saw in Half from your graveyard to your hand.
Activate the Cormela token by paying ({1} magic symbol) and tapping it, adding ({U} magic symbol) ({B} magic symbol) ({R} magic symbol) that can only be spent to cast instant and/or sorcery spells.
Activate Ashnod's Altar by sacrificing the Cormela token, adding ({C} magic symbol) ({C} magic symbol) .
When the Cormela token dies, it triggers, returning up to one instant or sorcery from your graveyard to your hand.
Cast Victimize by paying ({2} magic symbol) ({B} magic symbol) , causing you to sacrifice the Cormela token and return Cormela and another creature from your graveyard to the battlefield.
Repeat.
Results
Infinite LTB.
Infinite ETB.
Infinite sacrifice triggers.
Infinite death triggers.
Infinite storm count.
Infinite magecraft triggers.
Infinite colorless mana.
Return all instant and sorcery cards from your graveyard to your hand.
Infinite red mana that can only be spent to cast instant and sorcery spells.
Infinite blue mana that can only be spent to cast instant and sorcery spells.