Dockside Extortionist on the battlefield or in your graveyard.
Victimize in hand or in your graveyard.
Saw in Half in hand.
Cormela and Altar of Dementia on the battlefield.
Opponents control at least two artifacts and/or enchantments.
({2} magic symbol) available.
Steps
Activate Altar of Dementia by sacrificing Dockside Extortionist, causing target player to mill cards equal to Dockside Extortionist's power.
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 Dockside Extortionist from your graveyard to the battlefield.
Put the token Cormela into your graveyard due to the legend rule.
Dockside Extortionist and the token Cormela trigger.
Resolve the Dockside Extortionist trigger, creating at least two Treasure tokens.
Resolve the Cormela trigger, returning up to one instant or sorcery from your graveyard to your hand.
Activate two Treasures by tapping and sacrificing them, adding ({2} magic symbol) .
Repeat.
If opponents control three or more artifacts and/or enchantments, this combo nets infinite Treasure tokens.