Bane of the Magi

A chrome shiny collar, with various colourful gems affixed to its exterior. Large amounts of arcane sigils dress the interior of the collar, etched into the metal.

When a humanoid has this item placed around their neck, they gain the following properties:

They are unable to cast spells or cantrips unless they are spells the creature can cast inertly, or through use of a magic item.

They obtain the properties of the Silence in regard to spell casting.

This item can be removed off another creature by casting Dispel Magic, with a Spell save DC of 21.

However, spell concentration is maintained while having these effects, as well as any active magic effects stay active until their durations end.

Notes: Restrained