Both the face commander Dina and the old Dina, Soul Steeper care about lifegain and sacrificing creatures, and Beledros Witherbloom herself helps to contribute to that theme really well, not to mention payoffs like Veinwitch Coven and Blight Mound (both reprints from the OG Strixhaven precons)
This was more of a drawback before Link monsters allowed the player to simply Link that monster off , but they also have Zoodiac Barrage to use that monster as fodder to get another Zoodiac from the deck
The monster also gains +200 Attack Points (baseline 2100)
If that wasnt bad enough, it can last up to three turns thanks to the summoning requirement of the card being 3 monsters, and the cost of the effect being a measly one XYZ material
For two Blue and Two Black, you can have a player lose X life and mill X cards, where X is the number of Zombies you control