A pair of standard, factory-made dice which, when rolled, influence the surrounding area like a standard Monopoly game. Not much of a "creepy" SCP, but could make for some interesting experiments and logs. The only weird ability I have come up with so far (and which started this whole idea) was when someone rolled doubles twice, they would end up in prison, or compel them to commit a crime to be sent to prison, etc. Could exhibit other, spatiotemporal properties that could vaguely and creepily relate to actual Monopoly gameplay.
I seem to recall a string of deleted dice-related SCPs. I can't see this faring much better. Though ultimately it's hard to tell without a draft.
The alterations of fate is a bit too complicated to be just rolled by a pair of dice by Foundation standards. Aesthetically, it is a nice concept. One's fate is summarized to a simple casting of dices.
I don't think it would work well with monopoly dice, the rolling doubles twice is really the only thing you could do. Maybe if the dice had pictures displaying different fates on each side it would be interesting.
Dice that affect probability or change your future are overdone and generally end badly. That said, as Kalinin mentioned, there's really not much we can say without looking at a draft. SCPs, just like any other artistic medium, are 10% idea and 90% execution.
The dice wouldn't necessarily have anything to do with fate. They would just do strange and unexplainable things when people rolled them; the event would happen, and people would go on with their lives (if they could); or, people would be compelled to keep rolling the dice and "playing", even if they didn't want to. Writing a draft now in the Sandbox.