The bright blue of Mews eyes also matches the shade of blue used in the background, tying the entire card together
If you call "monster" for this effect against an opponent without Sinister Serpent in their graveyard, they will likely send Sinister Serpent to the graveyard looking to capitalize on the situation
Cost aside, the other big problems with cards like Omniscience is their lack of immediate impact and the fact that they taper off once you run out of cards in hand
#59 Vannifar, Evolved Enigma Vannifar, Evolved Enigma plays in the same space, but has some other upsides
I don't run it in my drafting cube as it is too narrow there now hence it not being mentioned in this article
However, it requires an unblocked critter to do so, so there is no guarantee that your opponent will let one through early if they can stop it