A McGuffin for a CogNet based story that is not really Cosmic Era

The Chandelier of Eldronas hangs in the grand foyer of Terrasquestone Castle, where it is both a marvel of craftsmanship, but also a powerful relic and one of the Seven Treasures of that great castle

yeah

Seven magical beans each with a different effect, that may be a boon or a bane and sometimes both, to their owners.

The Gates of Good are marvels of magitech that keep criminals, the infected and rabble rousers out of town.

The Slatehaven Collection is a series of art pieces and artifacts surrounding a single astounding archeological find, the Slatehaven Monolith.

7 flags with meanings when flown at sea.

An unusual spell

The skull of a storm giant

A desperate and powerful magic item

Jilsea remains a ruined mausoleum on a distant peninsula, for a thousand years it had been defended by the seven busts, and after they were stolen, the city fell.

What is this monstrosity, Jenkins? Does the War Department expect us to build every psychotic anime fantasy they see?

Rear Admiral Nelson Rampardos

There are currently only three arcanocrons in existence, and they are either the next generation of arcanotechnology or the biggest waste of resources since the Vaccine Wars of the 2030s

Also known as Loonshine

Have you considered the health benefits of short term death?

Severed heads that the Viking Clan Tyr uses as security cameras with runic magic.

A system of mechanical devices and the tension-batteries that power them.

Some magic items for you highish level fantasy games

The arch-mage and infamous castellan Veavingax was best known for her extensive construction of magical defensive towers and fortifications that ringed her equally infamous fortress, the Armathian Citadel