Its a PREMIUM Miracle!

Hah, glad I'm not the only one that thinkgs that... It's my opinion that they could've worded this better:

"For only NX 3,100 you get all the amazing qualities of a regular Miracle Cube plus a 25% chance to add a bonus potential to your item until you reach the maximum number of potentials."

To me, that implies that potential items can have more than 3 lines, being as how there's only TWO flavors of potential equipment (2-line, and 3-line), the word "Maximum" is generally used in grammatically correct circumstances to imply a LIST (3 or more) is in effect, ie: you can't have A.) and B.) without C.) . My $0.02.

IIRC JMS has 1 line potential