Although they were similar and Abyssal Specter was the stronger of the two at 2/3, compared to 2/2, it was the loss of the hypnotic Specter as a first turn play that hurt the most
Was there anything in here that you liked
Yeah Grandmother Sengir is completely insane, so perhaps she would do it, but it seems like a very strange, silly plotpoint to get rid of an artifact absolutely central to the story
Or your deck could make interesting use of the exile mechanic to remove and return creatures to play for bonuses such as creating flying creature tokens like the Phantom Premonition deck does
The key here is that applies to everyone as well
Alternatively, you could also give a boost to the naturally weaker Snow White Lost in the Forest, which is also able to heal other characters and maybe a better option depending on the situation