Vat of Rebirth has at least two oil counters on it.
Opponents control at least three artifacts and/or enchantments.
({2} magic symbol) available.
Steps
Activate Altar of Dementia twice by sacrificing Dockside Extortionist and Corridor Monitor.
Dockside Extortionist and Corridor Monitor dies, triggering Vat of Rebirth twice, putting two oil counters on it.
Resolve both Altar of Dementia abilities, causing target player to mill cards equal to Dockside Extortionist's and Corridor Monitor's power.
Activate Vat of Rebirth by paying ({2} magic symbol) ({B} magic symbol) , tapping it and removing four oil counters from it, targeting Dockside Extortionist.
Kurkesh triggers, choose to pay ({R} magic symbol) to copy Vat of Rebirth's ability, targeting Corridor Monitor.
Resolve the copy of Vat of Rebirth's ability, returning Corridor Monitor from your graveyard to the battlefield.
Corridor Monitor enters the battlefield, untapping Vat of Rebirth.
Resolve the original Vat of Rebirth ability, returning Dockside Extortionist from your graveyard to the battlefield.
Dockside Extortionist enters the battlefield, creating at least three Treasure tokens.
Activate two Treasure tokens by tapping and sacrificing them, adding ({2} magic symbol) .
Vat of Rebirth triggers twice, putting two oil counters on it.