Rapacious Dragon on the battlefield or in your graveyard.
Cormela and Bloodflow Connoisseur on the battlefield.
({2} magic symbol) available.
Steps
Activate Bloodflow Connoisseur by sacrificing Rapacious Dragon, putting a +1/+1 counter on Bloodflow Connoisseur.
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.
Cast Victimize by paying ({2} magic symbol) ({B} magic symbol) , causing you to sacrifice the Cormela token and return Cormela and Rapacious Dragon from your graveyard to the battlefield.
Put the Cormela token into your graveyard due to the legend rule.
Rapacious Dragon and the token Cormela trigger.
Resolve the Rapacious Dragon trigger, creating two Treasure tokens.
Resolve the Cormela trigger, returning up to one instant or sorcery from your graveyard to your hand.
Activate the Treasures by tapping and sacrificing them, adding ({2} magic symbol) .