Here's my 1st problem.

I need Lv 4 key spheres.
After fighting in the Omega Ruins,The most I got was lv 3 key spheres.
I don't wanna fight Omega wep just to get like,3 Lv 4 key spheres.
I need at least 7!For Auto-Life,Ultima and Copycat.

2nd problem is:

It's possible to customise the 1 MP ability righT?
hOW do i get it?
Whats the item needed to customize it?
How do u get it?

Pls tell me.

Go Bribe Demonlith's for 900,000 gil and you will get 40 Level 3 Key Spheres.

As for the Level 4 Key Sphere's go Bribe Chimera Brain's for around 196,000 gil to get 2 of them from him.

Regarding improving your MP, well go beat up Vidatu in the Monster Arena - he drops MP spheres, two if you Overkill him.

For the 1 MP Ability, well some of the Celestial Weapon's have this Ability once you fully charget them up. That is if you got both the sigil and the crest for the weapon.

I believe that both Yuna and Celestial's once they are fully charged have the 1 MP Ability.

I see.
How do u get the Magnus Sisters?

First off you must get Anima and Yojimbo.

Then you need two key items, the Flower Scepter and the Blossom Crown to break the seal in Remiem Temple so you can get them.

For the Blossom Crown, go capture all the monsters for the Mt. Gagazet area for the Monster Arena owner. Once you have done that he will give you the Blossom Crown as a reward.

As for the Flower Scepter, go beat up Belgimine's Bahamut up at Remiem and she will give you it once you have beaten it.

I think this needs to be moved in the help booth...