Void Antimagic Field

A 12-foot-radius invisible sphere of antimagic surrounds you. This area is divorced from the magical energy that suffuses the multiverse leaving only Void energy. Within the sphere, spells can't be cast, summoned creatures disappear, and even magic items become mundane. Until the spell ends, the sphere moves with you, centered on you. The user can only cast Void magic, without using any spell slots but depletes the sphere's duration unless hit by magic spells with which it feeds on. Can be used once after every long rest.

Spells and other magical effects, except those created by an artifact or a deity, are suppressed in the sphere and can't protrude into it, same goes for weapons as well. Any magic weapon when within the sphere is suppressed, unless created by an artifact or a deity. A slot expended to cast a suppressed spell is consumed. While an effect is suppressed, it doesn't function, but the time it spends suppressed counts against its duration.

Targeted Effects. Spells and other magical effects, such as magic missile and charm person, that target a creature or an object in the sphere have no effect on that target, in addition the Magical energy stolen increases duration by 40 seconds 

Areas of Magic. The area of another spell or magical effect, such as fireball, can't extend into the sphere. If the sphere overlaps an area of magic, the part of the area that is covered by the sphere is suppressed, the energy stolen increasing the duration of the field by 60 seconds. For example, the flames created by a wall of fire are suppressed by the sphere, leaving a gap in the wall.

Spells. Any active spell or other magical effect on a creature or an object in the sphere is suppressed  while the magic energy stolen increases the fields duration by 5 seconds for each item and creature, or object that remains within sphere at the end of the round.

Creatures and Objects. A creatures created by magic that enter the field dissolves out of existence, their magic energy becomes fuel for he sphere adding 30 seconds to its duration. Any magic objects are temporarily nullified until out of the sphere.

Dispel Magic. Spells and magical effects such as dispel magic have no effect on the sphere. Likewise, the spheres created by different antimagic field spells don't nullify each other.