So with this having the potential that it does, we're going to say that each attempt, as well as in each loop, would require an RNG roll to pull off. We'd subject it to your investigative roll cap of 3, if you'd like to use them all to accomplish this. Give us a name and a time loop per, and we'll see where we get with it. A pretty standard DC 13 will apply to each attempt.

As for the view into the chasm, you would see about 120 feet down into it, but uncovering something, as well, will cost you an investigative roll.

Choose wisely!