Final Fantasy XI
I Can Hear A Rainbow (Summoner Flag Quest)
Go out and fight leeches, they will drop a Carbuncle's Ruby, which is a very rare drop. Once you have the stone item, go to Windurst Walls and click on the door in the House of the Hero to talk to Ajido-Marujido. You will be told to experience all 7 weather elements. To do this, visit various zones until you have seen each type of weather pattern in the world (you will be shown a cutscene of the stone changing color). NOTE: You cannot acquire weather effects in towns or dungeons, nor can you obtain them from a Scholar casting the weather effect on you.
Red - heat - Valkurm, Rolanberry, Altepa, Yhoator Jungle, Meriphatud Mountains.
Orange - clear skies - most places
Yellow - sand - Valkurm, Tahrongi, Konschtat.
Green - wind - Tahrongi, Mhaura, La Theine.
Indigo - ice - Xarcabard, Beaucedine etc.
Blue - rain - La Theine, Pashhow, Rolanberry, Buburimu, Yhoator Jungle, boat rides
Violet - thunder - Konschtat, Jugner, boat rides
You will know you got the pattern by zoning and seeing a cut scene. If you don't get a cut scene, you didn't get the pattern. You don't have to be near the weather, just in the same zone as it.
Once you have all 7 patterns, go to La Thiene Plateau and find the stone circle at G-6. Trade the stone to ??? and you will get flagged to be able to change jobs to Summoner.