Grave Upheaval is great in the late game, bring back the best dead creature you can find, but none of that matters if you can't get to the late game because you're stuck on two lands
A wrinkle to this consideration is that it appears that many (or maybe all) of the Attractions have different versions where different sets of lights from two to five are lit up (remember a one is always a miss, and a six is always a hit)
The three-cost common will Sign in Blood you and then with void your foes lose the life instead of you
That said Blackmail is much more playable than it is generally given credit for and is a fun and skill intensive card to play with too
Aristocrats drain : Sacrifice-focused strategies that drain opponents (e.g., Mikaeus , Tormod )
Finding a window to actually slam The Water Crystal, Sphinxs Tutelage, or Stock Up is very difficult