A particular element of Reality eludes you. No matter how devoted you might be to mastering its complexities, this field of magick remains a challenge. Essentially, this is the reverse of the Merit: Sphere Natural, described above; one Sphere costs 130% more (rounded up) to learn than the other Spheres cost.

Again, this Flaw can apply to only one Sphere (fortunately!), and comes through in your practice and backstory. Someone who’s inept at understanding, say, Time will have a very wonky relationship with schedules and timing.