If you cast Sheoldred early on and your opponent doesnt have an answer, it will slowly tax your opponent out of the game
While the deck isn't especially fast (although it can occasionally get aggro draws thanks to Valley Mightcaller), the value engine it offers can be almost unbeatable in the late game
You can also check out the full card listing, set, and product details, plus the release and event calendar
Or at least, thats how it works on the face of things
You can, of course, splash out for other Orzhov staples beyond the manabase, and I think Smothering Tithe and Chivalric Alliance are two big ones that can offer a lot to us
Prereleases are great because the set is totally new, the footing is fairly equal as everybody plays with the set for the very first time, and you're all just relaxing and having fun exploring the new cards