You can also sacrifice blood tokens to other effects, like Powerstone Fracture, without discarding a card
[[Necropotence]] and its newer cousin [[Necrodominance]] are top-tier examples and both are probably going in the deck anyway
Creature - Insect Color tag templates(None) Solemn Simulacrum When this creature enters, you may search your library for a basic land card, put that card onto the battlefield tapped, then shuffle
Part of that is that having multiple 5/5s in play as early as turn 5 can stop other decks from attacking into you to gain advantage, and those 5/5s being quickly lethal also stops those same players from going shields down and attacking each other for long, too
In his latest article, he compares both experiences and goes over each of the two decks in detail
I suppose that if someone is building an early machine that threatens the table, we could make the commander damage threat