First, the deck features a huge number of creatures and spells that generate blood tokens including Voldaren Epicure, Olivia's Attendants, Falkenrath Forebear, Voldaren Bloodcaster, Restless Bloodseeker, Blood Petal Celebrant, Vampire's Kiss, etc
I highly recommend reading his article, and some of the discussion below relies on you looking at it
Theres also a few cards that let you play lands from your graveyard or bring them back en masse, creating an endless cycle of sacrificing and replaying the same lands while reaping the benefits
However, if you can get past that arbitrary guideline Ive set, you wont find a nicer one than this
I am concerned about the costs on this card
Tapping a creature when he attacks is good, and getting bigger with each artifact you play can be nice, but with no evasion and no protection he's likely to just get removed before you have a chance to do anything