Fun with Shadowborn Apostle.dec. You could go T1, Shadowborn, T2, Shadowborn-Shadowborn, T3, Shadowborn-Summons-Griselbrand.The more I think about it, the more it makes sense to make black's characteristic creature a sycophantic, destructive cultist, rather than a mindless zombie. Being a class means it can overlap with other race-tribal situations as well.
I get that Cultists count double, but it's really unintuitive from the text. If designing top down demonic summons 2BBSorcery (R)As an additional cost to cast demonic summons sacrifice a creature.Put a black creature cards from your hand into the battlefield.