They are actually a lot like the Eldrazias an example I have already written aboutas they can be grouped together by their shared creature type, but can also work very well on their own as independent creatures
And all that without so much as a new keyword mechanic
Likewise, Bone Splinters probably isnt worth running unless youre an aristocrats deck that benefits from sacrificing a creature
If the number of attacking creatures isn't greater than the number of quest counters on ED-E when you attack, its second ability won't trigger at all
If you cast a spell this way, that creature enters with a finality counter on it
Even though Grixis Control is the most obvious home for Nicol Bolas, God-Pharaoh, I think the card is good enough to play elsewhere, as evidenced by my Temur-based Five-Color Planeswalkers deck from last weekend