General

So, please fill me in on some info!

I took a 7 month break from maple.
And now that I'm back, there's so many new things.

Potential. What on earth is that? How come some have 3 lines, 2 lines, or 1 line? And does cubing completely change it?
How do I get a potential onto a normal equip?

Enhancement. What does it really do? Does is just add stats? Let's say the first one is 100%. What does it add?
And should i enhance AFTER I maxed out scrolling? or BEFORE?

And honestly, What's with the stars on these, BEYOND godly equips?

I remember when Nexon stated that "NX only makes people look cooler. People who have NX will NOT have an advantage in the game: damage-wise.
...what happened to that NExon?