The rationale for it being colorless was that the magic was invisible
They constantly put out new cards to the point where most new cards are designed with Standard in mind
"Big Things Are Coming for Commander in 2020 | MAGIC: THE GATHERING"
It's actually been a while since Magic has released sets this way, so it's important to mention that Torment was a small set and was part of the Odyssey block, which also includes Judgment, which I'll cover next
Upon being cast, Shahrazad forces the players to stop the game that they are currently playing, then starting a subgame of Magic using their decks
It could serve as a binder placeholder, something to talk about when people come over, or just as a weird trophy to say you have the card at some point without having to pay for a nice copy