This is a magical billiards ball, that is able to predict the future with moderate accuracy. Any amount of times per day, someone who holds the ball can ask it a question. The holder rolls an Insight check, and passing a DC of 15 the DM answers honestly to the best of their ability but with their choice between the right and left columns in the following, a failure choosing from the center column:

● As I see it, yes                                                                                          ● Reply hazy try again                                                                  ● Don't count on it

● Most likely                                                                                                 ● Ask again later                                                                           ● My reply is no

● Outlook good                                                                                            ● Better not tell you now                                                              ● Outlook not so good

● Signs point to yes                                                                                     ● Cannot predict now                                                                  ● Very doubtful

However, for every time it is used in a day after the first time, it gains a cumulative 25% chance of failure even if they pass the Insight check. So on the second time, it would be a 25% fail chance, the fourth time would be 75% fail chance, any time after that being a 100% fail chance. On a failure like this, choose the center column (Or from the wrong column, if you hide the % check from your players and are feeling devious)