Grabbing a card out of two and tossing the unwanted one is a very good way to get to the cards you truly need to dominate
There are some duplicates, but they are intended to help players gravitate towards the standard format
GSC play a very interesting role in the expansions of the Hive Fleets
+1: You may sacrifice a Vampire
Preventing opponents from gaining life for the rest of the game can simply shut down certain strategies in the format, so Stigma LasherStigma Lasher is an interesting "hate bear" option in aggressive and/or burn-heavy mono-red decks like Zo-Zu the PunisherZo-Zu the Punisher, Subira, Tulzidi CaravannerSubira, Tulzidi Caravanner, and Ashling the PilgrimAshling the Pilgrim
It also offers some graveyard control, exiling a card from a graveyard for 2B and giving us another Zombie if it was a creature card