Dockside Extortionist and Corridor Monitor dies, triggering Vat of Rebirth twice, putting two oil counters on it.
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.