Emet-Selch, Ascian K'rrik, Son of Yawgmoth requires a ton of black cards to do much, and its a card thats much more aimed at something like Commander than Limited
WWC - Buster Tail 130 Arctibax AR WC - Slither Fin 40 WWC - Frost Smash 80 Frigibax AR WC - Tackle 30 Oh boy, that Iono card will be very expensive as hell
Also, not to harp on this point too much, but if it's really all about "playing Magic
No clear win condition A pile of good cards is not a deck
Yes, it enters tapped, but whenever you use its mana to cast a creature, youll get to scry, which makes a huge difference in the long run
Bedevil As I mentioned above, versatility is important in Commander