if anyone cares where can i get a loada lv 4 key spheres i only got 1

*SPOILERS*

Well, the most difficult way would be to defeat Nemesis at the Monster Arena. But, I don't think you want to do that.

The easier way is to go to the Calm Lands. Fight a Chimera Brain there. Bribe him for at least 196,000 gil, and you should receive Lv. 4 Key Sphere x2, most of the time.

Steal- Nemesis (Monster Arena)
Dropped by - Seymour Flux (Mt. Gagazet)
- Spectral Keeper (Yevon Dome)
- Omega Weapon (Omega Ruins)
Rarely dropped by - Land Worm (Inside Sin)
Bribe - Chimera Brain (Calm Lands) (For 196.000 gil)

I got the most ones in the Omega Ruins from the chests. Because when you open the chest, the first one will always be a lv 4 key sphere. All the chests are hanging together somehow. So when you start and run through, every single chest counts.....

To cut the "chain" of the chests, I opened the first ones, went to the savepoint and restarted the game. Then I did the next chest, back to the savepoint etc. When you do this, the chests always start with "chest one" again, which means a new lv 4 key sphere.

And sometimes you�ll get some inside of Sin. :)