Magical WMD

Magical Weapons of Mass Destruction are a blanket category for a number of weapons technologies using the properties of Charged Magicite, including Layered Enchanting and the Magic-Mass-Energy conversion principle, to create spell weapons of incredible power. These weapons can have a number of effects including: The ability to transmute large quantities of mass, the ability to create extreme blasts equal to thousands of conventional spells, the ability to spread disease, and the ability to nullify existing enchantments, and the ability to mind control vast numbers of individuals.
MWMD leave behind "fallout", a dusting of Active Magicite that causes secondary magical effects to linger in the target area. Originally these effects were unpredictable, but eventually Active Magicite Fallout effects were managed by increasing the device complexity in order to have a "desirable" fallout effect. Currently, the entire Wastelands as well as some parts of the Broken Horn and New Southmark are completely ecologically devastated by fallout effects from MWMD, with life unable to survive in the affected areas.
It is widely believed Thalassa only discovered the technology to create Magical Weapons of Mass Destruction a few decades before the Seventh Crusade. No one knows when Fennein had them, but it is supposed that they possessed them long before Thalassa but for whatever reason chose not to use them. The Dwarves stole a Thalassan MWMD early in the war and reverse engineered it at great cost with their first working prototype completed in 970 PE. At present, only the Elves and the Dwarves have MWMD, while the Empire of Verdon is researching them furiously. The Dwarves jealously guard MWMD tech, even going so far as to deny having any active MWMD, although certain voices in the Royal Mages' Guild are attempting to prevail on High King Rothâs Thorangar to build more and share the tech with the Humans.
MWMD tech is incredibly complicated, with thousands of spells being imbued in different parts, alignments, and intensities carefully oriented to acheive the desired affect. Annihilation MWMDs, for instance, use hundreds of force spells and fireballs aimed inward to the center of the device to create an instantaneous area of extreme temperature and pressure, causing a tiny amount of material to convert itself into energy.

Utility

So far, MWMD has not been a deterrent. Nations with MWMD fight one another, and aggressively. They even use MWMD in open warfare.
Thalassa and Fennein use the threat of their MWMD as a threat to prevent Imperial expansion. The Dwarven Mountainhomes are sitting on a stockpile of unknown numbers of MWMD (somewhere between 10 and 60 by some intelligence reports).  The near devastation of their own population in the The Seventh Thalassan Crusade  has not deterred them from pursuing the technology.

Manufacturing

An MWMD can take up to a year to make at first, but methods do exist to make the process quicker.

Complexity

Very High