Chance

Description (Neo)
Chance

0 to 999,999mp or 400mp

Change the probability of an event in reality. Results are based on the distance to the target, complexity of the target, visibility of the target, the mana spent, the time taken to cast, the preponderance of necessary elements for or against the desired outcome, the number of mundane witnesses (who can perceive an unusual probability, when applicable), and the number of times Chance has already been cast.

Base change is 1%.

Alternatively, 400mp flat can be spent to reduce or raise a probability of a future magic spell's critical chance to 0 or 100%.

Reference
Chapter 73 "John Newman doesn't understand how to play the Game"