18. The wizard has researched a new spell named “Chance Minutia.” What does the spell do?
Chance Minutiae is the micro-transaction bitcoin engine of the magic world. Most wizards don't notice it, it just ticks away in the backgrounds, gathering momentum slowly while magical effects unfold around it. It doesn't seem to do anything useful at all to those capable of sensing magic (or those who cast detect magic around it), and for that reason it's generally ignored. Every time a magical effect fails in the vicinity of the spell, the magic energy is still released... this spell simply absorbs a tiny a ount of the excess magic energy and funnels it to a storage cell amulet. The more common effect of the spell (and the effect for which it was named) relies on those magics that manipulate probability in it's vicinity. Every time a magical effect distorts probability (by increasing or decreasing a die result by a minor amount), this spell absorbs some of the probability flux energy. Not enough to make a successful action associated with the spell fail, and if a magical effect has been used to make an opponent's action fail, this won't draw enough flux energy to make it succeed again. It just syphons a point off the top.
In areas where spells of this nature are being regularly cast, Chance Minutiae might syphon a single point of probability flux energy every half hour or so (Roll a d6 every ten minutes, on a 6 a point of energy is gained...in a wizard school it might increase to one roll every five minutes, in a generally non magical area it might only be one roll every half hour). At the end of the spell's duration, the wizard casting the spell may modify the die roll of a single action by the total number of flux energy points accumulated by the spell while it has been operating.
From little things, big things grow.