Scourge of Nel Toth | Infested Thrinax | Pitiless Plunderer

(and one other card)

Cast
Infested Thrinax by paying ({3} magic symbol) ({B} magic symbol) ({G} magic symbol) .
When
Infested Thrinax enters the battlefield, it triggers, causing you to create a number of 1/1 Saproling creature tokens when a nontoken creature you control dies.
Activate
Altar of Dementia by sacrificing
Scourge of Nel Toth.
When
Scourge of Nel Toth dies,
Infested Thrinax and
Pitiless Plunderer trigger.
Resolve the
Infested Thrinax trigger, creating six 1/1 Saproling creature tokens.
Resolve the
Pitiless Plunderer trigger, creating a Treasure token.
Activate
Altar of Dementia by sacrificing a Saproling.
When the Saproling dies,
Pitiless Plunderer triggers, creating a Treasure token.
Resolve the
Altar of Dementia abilities from steps 3 and 7, causing target player to mill cards equal to the sacrificed creatures' combined power.
Activate two Treasures by tapping and sacrificing them, adding ({B} magic symbol) ({B} magic symbol) .
Cast
Scourge of Nel Toth from your graveyard by paying ({B} magic symbol) ({B} magic symbol) and sacrificing two Saprolings.
When the Saprolings die,
Pitiless Plunderer triggers twice, creating two Treasure tokens.
Repeat from step 3.