While looking through the upcoming Double Masters 2022 expansion cards I stumbled upon some interesting downgrades in rarity: Cartel Aristocrat and Carrier Thrall. Looking further I got the feeling that white and black got the most and best downgrades, still I wanted to do something with those cards.

Cartel Aristocrat can breech through your opponents defence if you feed her some creatures. Carrier Thrall or Persistent Specimen are her favourite food.
Mortician Beetle benefits from all the sacrificing and can get really strong over time. Use a Benevolent Bodyguard to protect him from removal if necessary.