Its very well balanced, makes for interesting and strategic gameplay and plays better than it reads
Gravebreaker Lamia is the perfect example of this: not only do you search your library and put that card into your graveyard, but she makes it so that spells you cast from your graveyard are cheaper
Sacrifice after III.) I, II This Saga deals 2 damage to each opponent and you gain 2 life
Liberty Prime is absolutely a beater, but with no way to protect itself, you're mostly just swinging with an 8/8 for five mana that might also cause you to sacrifice it at the end of the turn
The Profit Calculator turns raw cost, grading tier, and PSA 10 comp into a clean expected-profit number
Commanders like Marwyn, Lathril, and Voja give players various win conditions and mana generation options