Death Baron and Lord of the Accursed work together to make your zombies substantially stronger, while Diregraf Colossus and Champion of the Perished can both become huge with good timing
They look great in a binder but don't move your win rate over the standard-print version
This is still a really nice addition to decks that want to untap an artifact or two, like Traxos, Scourge of Kroog
I think many people use Gazimon in this slot The strengths of this guy are: - Because it is a Gazimon, it can easily evolve into Delta
For example, if an opponent controls no creatures and has 30 life when you cast Skull Storm and make two copies, the first to resolve causes that opponent to lose 15 life (so they have 15 life left), the second causes that opponent to lose 8 life (7 life left), and the original spell causes that player to lose 4 life, leaving the player at 3 life