Korvold, Fae-Cursed King | Golgari Thug | Pitiless Plunderer

(and one other card)

Activate
Ashnod's Altar by sacrificing
Golgari Thug, adding ({C} magic symbol) ({C} magic symbol) .
When
Golgari Thug dies, it,
Pitiless Plunderer and
Korvold's second ability trigger.
Resolve the
Golgari Thug trigger, putting it on top of your library from your graveyard.
Resolve the
Pitiless Plunderer trigger, creating a Treasure token.
Resolve the
Korvold trigger, putting a +1/+1 counter on it and causing you to draw
Golgari Thug from the top of your library.
Activate the Treasure by tapping and sacrificing it, adding ({B} magic symbol) .
Cast
Golgari Thug by paying ({1} magic symbol) ({B} magic symbol) .
Repeat.
If desired, you may instead use
Golgari Thug's dredge ability to return it to your hand to mill your library.