Antimagic Shackles

You can use an action to place these shackles on an unconscious creature. The shackles adjust to fit a creature of Small to Large size. In addition to serving as mundane manacles, the shackles prevent a creature bound by them from casting spells, using magic items, or using any magical abilities.

You and any creature you designate when you apply the shackles can use an action to remove them. Once per day, the bound creature can make a DC 30 Strength (Athletics) check. On a success, the creature breaks free and destroys the shackles.