Does Magic Crash depend on accuracy?

So at 123 (that's what your info says) you're able to MC third-form Scar every time, even though it's level 140 and your other attacks miss it 85% of the time?

While I've never been to Scarlion, I haven't missed a single debuff when playing with it a Papulatus on both JMST and GMS at level 120 when I fought it.