Guardian Circle

 is a Master-level Restoration spell in The Elder Scrolls V: Skyrim. Casting it creates a circle around the caster that heals for 20 points every second while also repelling undead creatures up to level 35. It requires both hands to cast.

Perks

 * Master Restoration allows the spell to be cast for half magicka.
 * Dual casting allows the spell to last for a longer duration.
 * Necromage, if the Dragonborn is a vampire, increases the duration of the spell.

Spell
Guardian Circle creates a magical barrier near the caster. The effects are constant as a Master level spell, but duration is affected by the perks mentioned above.

The spell has a standard duration of 60 seconds, increased to 132 seconds if dual cast.

As a vampire with necromage the spell has a standard duration of 90 seconds, increased to 198 seconds if dual cast.

Usefulness
Combined with magic absorb from either the Atronach perk or the Atronach Stone, the caster has a limitless supply of magicka as long as he/she is within the circle.

As a Master level spell, the listed effects are not altered by any perks. This combined with the long casting animation means it is ultimately less effective than a combination of high level healing spells and Circle of Protection; the latter combination will repel higher level undead and heal much more than Guardian Circle.

Attributes

 * Weight: 1
 * Value: 1220
 * See Spell Tome for a complete table of spell tomes, their descriptions, and their values.

Acquisition

 * Collette Marence at the College of Winterhold sells this spell after the completion of the Restoration Ritual Spell.

Trivia

 * Guardian Circle is one of only two Master level spells that can be dual cast. The other being Dragonhide.

Bugs

 * Sometimes,after completing the Restoration Ritual Spell quest,Collette Marence will not sell this spell
 * Gardian Circle can be daul cast; however, the durition is still 60s although the Active Effects shows it is more than 2 min.