Bolster Magic

A 10-foot-radius glowing sphere of magic surrounds you. This area is filled with the most potent forms of the magical energy that suffuses the multiverse. Within the sphere, spells do twice the damage, summoned creatures arrive in doubles, and even magic items become enhanced. Until the spell ends, the sphere moves with you, centered on you.

Spells and other magical effects, except those created by an artifact or a deity, are boosted in the sphere and can't protrude outside it. A slot expended to cast a boosted spell is consumed. While an effect is boosted, it functions more effectively, but the time it spends boosted 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 an enhanced effect on that target.

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 enhancedd. For example, the flames created by a wall of fire are enhanceded within the sphere, creating a roaring inferno over the wall and around it if the overlap is large enough.

Spells. Any active spell or other magical effect on a creature or an object in the sphere is enhanced while the creature or object is in it.

Magic Items. The properties and powers of magic items are enhanced in the sphere. For example, a longsword, +1 in the sphere functions as a +2 longsword.

A magic weapon's properties and powers are enhanced if it is used against a target in the sphere or wielded by an attacker in the sphere. If a magic weapon or a piece of magic ammunition fully leaves the sphere (for example, if you fire a magic arrow or throw a magic spear at a target outside the sphere), the magic of the item ceases to be enhanced as soon as it exits.

Magical Travel. Teleportation and planar work erratically in the sphere, whether the sphere is the destination or the departure point for such magical travel. A portal to another location, world, or plane of existence, as well as an opening to an extradimensional space such as that created by the rope trick spell, temporarily widens while in the sphere.

Creatures and Objects. A creature or object summoned or created by magic temporarily becomes stronger in the sphere. Such a creature instantly reverts once the space the creature occupied is no longer within 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. Also spheres created by different bolster magic spells don't enhance each other.