A small bar of yttrium barium copper oxide that has a large lightning bolt glyph engraved on the top.

If a spell that deals cold damage affects this item, the item activates and pulls any item composed of metal toward it in a 8 foot radius.

If the item activates while a creature is wearing a metal item in the item's radius, the creature must make a Strength saving throw contested by the number of metal items it is wearing times 3. If the creature fails the saving throw, they are pulled into the magnet dealing 1d6 bludgeoning damage and is restrained until the item deactivates. On a successful save, they move out of the item's radius.

The item only remains 'activated' for 20 seconds before becoming non-magnetic again.

While inactive, the item makes a great electrical conductor.

Notes: Restrained