Although black doesnt have as many flying creatures as blue or white, it does have some
While some of them have fallen from their ludicrous, cryptocurrency-inflated 2018 highs, nobody has ever been sad about owning Underground Sea, Gaeas Cradle, or even Replenish unless they bought in at the absolute top of the market
Black has intimidate and swampwalk
Since vampires arent as supported in Orzhov because of the lack of red aristocrats is my main suggestion
Its definitely possible to bounce an army of knights or a pack of Wolves (or even just two copies of whatever random creature your opponent happened to draw), but having an abundance of this type of effect is very nice when were very happy to bounce one or more copies of our favorite Merfolk Wizard
If you choose sorceries, Blasphemous Act wont have any effect