No doubt it should be hard to get, but I hope they can be a little more original than to just copy the format from FFXI. If I'm going to get an ultimate weapon, I should expect to have to go on the ultimate quest to find it!

Make it start off something like mog tablets where you have to search the entire world to find the basic weapon in some random location. It can be absolutely anywhere, including in some obscure part of a dungeon that people usually don't go to because its out of the way or something like that. Make it so only one can appear every month or so, and the type of weapon is different each time.

Once you've actually found the weapon, you have to figure out how to unlock its power. You have no clues about how to do this. You just get the weapon and have to figure it out. Perhaps you need to bring it to a certain location in the world at a certain time or have it exposed to certain whether effects or have to kill certain NMs with it, or all of these!!

Once the weapons power has been released you then have to learn how to equip it!! The ultimate weapon chooses its master, not the other way around!! Perhaps you were not destined to have the ultimate weapon because it is not favored by your guardian diety and no matter what you do you can't equip it because you chose the wrong guardian ! So you can only use the ultimate weapon for your guardian and if you want to use it you have to be the class that it goes with.

So now you have to figure out which weapon goes with your guardian and start all over !!! Hahahaaaaaa

Once you finally figure that out and get back to this point, you can finally equip the weapon but its not over yet! You must prove to your diety that you are a worthy hero capable of wielding this weapon and the only way to do this is appease the gods by defeating their enemies ! You must fight and defeat 1000 enemies at the same time (of course you can use the relic weapon at this point). If you die then the gods will banish you from using the weapon and return it to its resting place where you must now start all over again by finding it in the world !!

If you pass this test then you will finally be able to keep the weapon !!

Or something like that .... /daydream off