Dungeons. The source of the economic, technological, and military might of the Northern World over the rest of the globe. Manaliths were the premier source of convenient portable accessible energy.
Even if handled by those without mana, there was practically zero danger because even when manaliths are jumped, discharged, or what not, the mana merely fizzles out into the atmosphere. Mana explosions can only occur under specific conditions, none of which are present in a manalith especially without the intervention of someone who can handle mana.
Manaliths were the number one export of nearly every country in the Northern World in terms of revenue and profit. The processed versions of manaliths were worth even more out there due to their ease of use.
Manaliths were the crystallized form of mana, usually refined from either mana cores hidden inside monsters or from the dungeons itself.
