Grossly Magical Object
A Grossly Magical Object is any item or artifact of sufficiently magical nature so as to be considered "unnatural". Any such item is to be reported to the Department of Dangerous Artefacts (DoDA) in Blue Wizard Bastion and kept under lock and key.
GMOs are occasionally lent out to accredited institutions for use as anomalous power sources - the terms of these leases are always defined by a licensed cryptomancer and typically cover a term of no more than 6 months.