While most of these cards reward you for sacrificing creatures, you can go even deeper with cards that trigger when you sacrifice a creature or when a creature dies
Soldiers often dominate a ground game, then Harbin lets you count up your lethal damage and overwhelm an opponent that might have a few fliers, or even one big one, but it's rarely enough to defend against a pumped battalion flying at them
Still, there will be times when the ability doesnt do much either way, and I think that probably keeps it from getting into first pickable range
Will your opponents collaborate to deny you resources, or fall into a Nash equilibrium of selfish decisions that fill up your hand
On top of that, it has an activated ability to make everyone discard again
Instead, I'll post them in "deck list" form so you can easily see their current prices