Whenever you leave a certain battle area, you always usually lose all Magicite you are holding, which means you cannot keep the magicite for more than one battle area, and that means it later becomes harder as fewer critical nesscary magicites become scarer. Also, there are absoultely no guarantee that you will locate and obtain any Magicites. However, there are certain basics Magic Rings that allow you to have the same effect as Magicite, these are known as Magicite Rings and they last forever during your Crystal Caravan. Magicite Rings are known as Artifacts and they can be found in certain areas. However they you don't have a 100% chance of recieving a Magicite Ring. Firstly, you can tell before the area is completed if you can recieve a magicite ring, during the playthrough, if a monster happens to drop it, you recieve it like other Artifacts, for only that area, however once you complete the area, you can select for the dungeon area bonus.