The fulminar magically creates three sets of shackles of lightning, each of which can strike a creature the fulminar can see within 60 feet of it. A target must make a DC 16 Dexterity saving throw. On a failure, the target takes 18 (4d8) lightning damage and is restrained for 1 minute. On a success, the target takes half the damage but isn't restrained. A restrained creature can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success.