Please buy with no worries
Search your library for a creature card with mana value equal to 1 plus the sacrificed creatures mana value, put that card onto the battlefield with an additional +1/+1 counter on it, then shuffle
Illustrated by Cons Nitands , the card layers ribbons of pink, yellow, and lilac light behind Clefable, with sparkles arcing around it to create a sense of upward, almost weightless motion
Next we have black's other staple, creature destruction
Unfortunately, this is mono black, so you are pretty much limited to artifacts to protect her and the high cost of 6 means a dead Nightmare Moon is going to be hard to replay multiple times
If you do, search your library for a planeswalker card, put that card onto the battlefield, then shuffle your library