Defense of the Heart's ability will check if an opponent controls three or more creatures as your upkeep begins
Still, if you have seeded your graveyard with creatures you can cast, once this lands, you can turn your graveyard into your hand, at least for creatures
Both Midnight Hunt and its partner set Innistrad: Crimson Vow would both go on to be reprinted in a set together named Innistrad: Double Feature which combined both sets into one, making the original prints of the sets alot less desired
The former is better than the Angel since it cannot be harmed by colorless creatures either
However, Krenko's best feature out of everything: he's a token machine
The same is also true of any other abilities that modify how a land enters or apply "as" a land enters, such as that of Vesuva or Cavern of Souls