How do you get advance enchanment?

So lastnight i was looking at the FM, and i saw advance enchanment scrol sell for 1.3bill. Does any1 know how to get?

1. It's enhancement.
2. It's a drop from Chaos Zak, Chaos HT and Pink Bean.

How is it different from normal enhancement scrolls, and can't you get one from saving pieces left over from Miracle Cubes?

It only comes from the above listed bosses, or gachapon (well, atleast it did come from gachapon, I'm not sure if it was removed though). You cannot get one from saving miracle cube pieces. It's different in that it starts with a 20% higher chance ato succeed than a normal enhancement scroll, though it still drops down to 10% success rate eventually. So the Advanced Enhancement goes: 100%, 90%, 80%, 70%, 60%, 50%, 40%, 30%, 20%, 10%, 10%... So the first use is a guaranteed success; once you've passed 9 enhancements though it's the same probability of success as normal enhancement scrolls.

It only comes from the above listed bosses, or gachapon (well, atleast it did come from gachapon, I'm not sure if it was removed though). You cannot get one from saving miracle cube pieces. It's different in that it starts with a 20% higher chance ato succeed than a normal enhancement scroll, though it still drops down to 10% success rate eventually. So the Advanced Enhancement goes: 100%, 90%, 80%, 70%, 60%, 50%, 40%, 30%, 20%, 10%, 10%... So the first use is a guaranteed success; once you've passed 9 enhancements though it's the same probability of success as normal enhancement scrolls.

Does it stack with normal enhancement scrolls? As in, if I used a normal enhancement scroll, the an advanced, does the advanced have a 100% chance of working, or 90% chance?

It depends on how many times it's been enhanced already. If it has 1 enhancement it's 90%/70%, if it has 2 it's 80%/60%, etc. regardless of what scrolls were used.

can't you get one from saving pieces left over from Miracle Cubes?

That's potential, not enhancement.