Arcana Abjura

"The school of abjuration emphasizes magic that blocks, banishes, or protects. Detractors of this school say that its tradition is about denial negation rather than positive assertion. You understand, however that ending harmful effects, protecting the weak and banishing evil influences is anything but a philosophical void. It is a proud and respected vocation."
— Yinexian Spiral Mage
  When detecting this type of magic it appears as a canary yellow.   Called Abjurers, members of this school are sought when baleful spirits require exorcism, when important locations must be guarded against magical spying and when portals to other planes of existence must be closed.   Mastery of Abjuration demands strategic thinking and patience, but can also work as an instinctual response for a person with compatible character, as many abjuration spells function as reactionary responses to threats. This makes reaction speed particularly important to an Abjurer.   Abjuration magic is associated with the color yellow, that can be sensed on the magic's aura, especially during a detect magic spell. Casters and their targets may often experience it having "a smooth texture sharp edges." A caster may experience a "cooling effect" in their body as the spell is cast; however, this is not always the case. However, it is a common consensus that abjuration is mostly either warm or neutral stream of energy, rather than a cold one.   Abjuration was truly florished in the nation of the Uscon. The Reinledge royal family has poured thousands of gold into Blackfaire in order to make Abjuration trinkets to help protect the nobles, and it is thought that the Mage Collars were infused with the inner workings of Abjuration. While none can deny the terror these collars have wrought on mages, the sheer ability of them to exist has impressed many on a pure technological standpoint.   Abjuration spells can be roughly divided into three different categories, depending on their usages.  

Protective Barriers

  The most common use of abjuration is protection, and thus many different variations of different barriers and shields are stables of the school. These spells can function as walls, or boost the effectiveness of armor or even locks to make approaching more difficult to the enemy. They can fully protect or resist certain effects and increase the casters (or their targets survival.   Some barrier-type spells include: Shield, Magic Circle, Protection from Evil and Good, and Mage Armor.  

Traps

  Some of the Abjuration spells work more as traps, triggering to warn the caster or either harm or tie down the target. These spells often requite some preparation, though reaction spells occur in this group as well.   Some trap-type spells include: Absorb Elements, Snare, Glyph of Warding, and Alarm.  

Negating Effects

  The most devastating usage for abjuration is the ability to negate other magical effects. These spells can, in their best moments, toss of more powerful spells, making target loose power while the caster gets away scratch-free. Or banishing away foes from foreign palnes.   Some negating-type spells include: Counter Spell, Dispel Magic, Nondetection, and Remove Curse.

Casters that use abjuration spells primarily are known to deflect spells sometimes by instinct. From all mages, those who specialize in abjurations are the most likely ones to loose their powers after magical mishaps after accidentally sealing them away.   Despite this, on the whole, abjuration is considered one of the safest schools to use in terms of possible side-effects.
— The Great Wizard Lorenzo