User blog comment:Xilinoc/Ch. 645 - Don't Chase a Shadow/@comment-26154465-20151002054405/@comment-7805464-20151002075742

Yep I think if you are familiar with mathematics and coordinate geometry you won't think "X-axis" is weird. It's not as easily predictable as X-ray or nonsense like eXorcist (Defies the letter rule and Lille is clearly a sniper, not somekind of priest/necromancer)