Death Match | Dockside Extortionist | Brain Freeze

(and one other card)

Brain Freeze in hand or in your graveyard.
Dockside Extortionist in hand or in your graveyard.
Death Match and
Underworld Breach on the battlefield.
If
Dockside Extortionist and/or
Brain Freeze are in your graveyard, you have an additional three cards in your graveyard for each one.
Opponents control at least five artifacts and/or enchantments.
({1} magic symbol) ({R} magic symbol) available.

If
Dockside Extortionist is in your hand, cast it by paying ({1} magic symbol) ({R} magic symbol) .
Otherwise, cast it from your graveyard for its escape cost by paying ({1} magic symbol) ({R} magic symbol) and exiling any three cards from your graveyard except
Brain Freeze.
Dockside Extortionist enters the battlefield, triggering itself and
Death Match.
Resolve the
Dockside Extortionist trigger, creating at least five Treasure tokens.
Resolve the
Death Match trigger, giving
Dockside Extortionist -3/-3 until end of turn.
Dockside Extortionist dies as a state-based action due to having zero or less toughness.
Activate four Treasure tokens by tapping and sacrificing them, adding ({2} magic symbol) ({U} magic symbol) ({R} magic symbol) .
If
Brain Freeze is in your hand, cast it by paying ({1} magic symbol) ({U} magic symbol) .
Otherwise, cast it from your graveyard for its escape cost by paying ({1} magic symbol) ({R} magic symbol) and exiling any three cards from your graveyard except
Dockside Extortionist.
Brain Freeze's storm ability triggers, creating a copy of
Brain Freeze for each other spell you've cast this turn.
Resolve the first two
Brain Freezes, causing you to mill six cards.
Resolve all remaining
Brain Freezes, causing target player to mill three cards for each
Brain Freeze.
Repeat.