@Trademarked by the Mishima Zaibatsu corporation. Creator Lucy Callaway.

AM grenades release an electromagnetic pulse that wreaks havoc upon all things magical.

As an action, you throw an AM grenade at a point up to 60 feet away. Creatures within 20 feet of the exploding AM grenade must make a DC 17 dexterity saving throw on a failure the creature's are unable to cast spells and all magical items worn are disabled for one hour. Additionally, creatures with the spell casting feature who fail the saving throw are stunned until the end of their next turn. Electronic objects within the blast, such as alarms and computers, are fried instantly unless they are properly shielded against AM effects.