Flexibility is good, and modal cards add too much to the game to the point that there are lots and lots of modal cards in the latest sets
You'd get three free packs to crack and give you a sense of the cards in the set
While this card could surely get lost in the 99 if youre not careful, there are other ways to apply this effect depending on your commander, or you could tutor it up with 7
While many may scoff at the strength of a pre-made deck in play, each starter deck is surprisingly effective and well-balanced against not only each other but can often hold up against custom decks
I still think this is pretty good, especially in a set with Exploit, but I dont quite think it is first pickable
Golgari (black/green) and Dimir (black/blue) builds playing Sheoldred already exist, and one of these color pairs might just emerge at the top of the new metagame