An immobile, faintly shimmering magical sphere surrounds the character and excludes all spell effects of up to 3rd level. The area or effect of any such spells does not include the area of the minor globe of invulnerability. Such spells fail to affect any target located within the globe. This includes spell-like abilities and spells or spell-like effects from devices. However, any type of spell can be cast through or out of the magical globe. Spells of 4th level and higher are not affected by the globe. The globe can be brought down by a targeted dispel magic spell, but not by an area dispel magic. The character can leave and return to the globe without penalty.

Note that spell effects are not disrupted unless their effects enter the globe, and even then they are merely suppressed, not dispelled. For example, creatures inside the globe would still see a mirror image created by a caster outside the globe. If that caster then entered the globe, the images would wink out, to reappear when the caster exited the globe. Likewise, a caster standing in the area of a light spell would still receive sufficient light for vision, even though that part of the light spell volume in the globe would not be luminous.

If a given spell has more than one level depending on which character class is casting it, use the level appropriate to the caster to determine whether minor globe of invulnerability stops it.