While it definitely feels like we're leaning more toward Rakdos Sacrifice builds with recent additions, Golgari has always been an old favorite so this is more likely to show up in those flavored builds as opposed to Blood Aspirant in the Rakdos ones
Once you reach max speed, he doubles the number of cards you draw
In addition to Urtet's ability which can be played before combat allowing you to untap and swing with massive Myr creatures, the deck features a number of different anthem and +1/+1 counter effects to pump your board including Master of Etherium, Steel Overseer, Urza Prince of Kroog, Chief of the Foundry, Myr Galvanizer, Tempered Steel, etc
Do they think this is a good top 5
Creature cards you own that aren't on the battlefield, creature spells you control, and creatures you control are the chosen type