It is the increase of creature power and tempo in the cube combined with a decline in combo that has made Witness fall a little out of favour Survival of the Fittest is not as widely playable as most of the other cards in this list but will still fit in a lot of decks as cube decks are full of one offs and green decks are pretty high on creatures
Blade of Shared Souls sees some play, and now that theres two reasonable blue equipments that make 2/2s out there, I wonder if blinking them for value would work
4 Narset, Parter of Veils / Spirit of the Labyrinth Narset, Parter of Veils, and Spirit of the Labyrinth may not make your opponents spells more expensive, but theyre still some of the most potent taxing options in MTG
It can even occasionally be a planeswalker, but only very specific ones, so its usually best to just stick to creatures
For a larger collection, you may want to break it down even further (creatures, noncreature spells, and lands for example) if you are organizing to locate specific cards
