The player has to get something, otherwise they'll spend their time doing something else. Personal opinion/speculation : These spells seem a tad too flavorful to become evergreen they only fit planes and stories that have a murder mystery theme, with detectives and law enforcement agencies
Get out your reading glasses, because Tarrian's Soulcleaver Coincidentally, Blade of the Bloodchief, previously at $4, is enjoying a bit of a price dip with its reprint in a Lost Caverns of Ixalan precon, and I expect the price to fall even more because the main set contains a far superior version of what Blade offers, even in a deck teeming with Vamps
I, among them, had a powerful deck that controlled the board and ran Morphling and Masticore as my only creatures (unless you count Mishra's Factory)
If an opponent resolves a Vampiric Tutor and they forgot that I've got Pyxis on the field, you can be sure I'll exile the card they searched for
I played a rattled off 4 wins in a row and time ran out as you can see in the 1st image after the decklist