User blog comment:Jho5689/Fairy Tail 337 and onwards/@comment-10425110-20130622030144/@comment-1359322-20130622051732

Well i guess we should start by explaining what is Second Origin, all Mages have a second "Container" for their Magic power that is largely unused, called the Second Origin. If the power within this second container is reached, then the Mage in question will receive an enormous boost in Magic Power and are able to reach new heights with their respective Magic or perform spells and activate abilities that they would otherwise have trouble with, with ease.