Avatar

Avatar is a creature type. An Avatar is an aspect or projection of a larger power. Avatars are powerful beings, and while most Avatars are benevolent, many are considered to be evil.

Alara
Only two known avatars are known to have existed on Alara. Both of these avatars were powerful incarnations of aspects of the plane itself, rather than a deity there.
 * Progenitus, the Worldsoul of the plane.
 * The Child of Alara was the manifestation of the Conflux itself.

Arcavios
The Archaics are a race of wise, giant, long-lived beings with an innate talent for magic. They can be seen striding through the Vastlands, exploring sources of magic with their many arms, or contemplating existence through their "eye," which is a magical focus of some kind. Archaics can live for thousands of years; many are thought to have been alive since the Dawning Age. Mages seek out Archaics for their vast knowledge of history and magic, but Archaics tend to communicate in obscure allusions and cryptic metaphors. Also, a being called the Blood Avatar was summoned by the Oriq, though it was defeated by the twins Rowan Kenrith and Will Kenrith. The Blood Avatar was a creature of war, being whose only purpose was to unmake what had stood for centuries.

Aerona

 * Gaea's Liege was the Maro-Sorcerer of Whispering Woods and an avatar of Gaea.

Jamuraa
On the continent of Jamuraa, a cycle of avatars represent the five colors of mana.
 * The Avatar of Hope is a winged creature whose appearance varied from time to time. It represents hope for those who despaired and can appear in times of great need.
 * The Avatar of Will is a creature resembling winged merfolk clad in ornate armor. This avatar can be easily summoned to defeat an enemy whose will was broken.
 * The Avatar of Woe is a powerful humanoid wearing black garments and wielding a large scythe-like weapon. It thrives in times of great death, and can effortlessly slaughter anyone it wants to.
 * The Avatar of Fury resembles a fire-breathing, winged serpentine creature possessing four arms, two of which end in large, metallic spikes.
 * The Avatar of Might is a towering bipedal creature with the head of an elephant and skin resembling bark. It is the largest of the five avatars, although it lacks the flying abilities of the Avatars of Hope, Will, and Fury.

Otaria
Her reincarnation was the manifestation of all Dominarian mana, brought into being by the aggregation of Akroma, Phage, and Zagorka, all slain by the Soul Reaper. During her brief existence, she further devastated the already war-torn Otaria and disrupted the very fabric of magic on Dominaria. Her abilities stemmed from that of faith, that anything a being could believe of her, she could accomplish.
 * Phage the Untouchable
 * Karona was the living incarnation of magic, accidentally created by the Numena before the time of the Thran. The numena knew that she was a threat of the greatest measure, and destroyed her at the cost of their lives.
 * Scion of Darkness was the avatar of Kuberr before he gained physical form from the union of The First and Phage.

Sarpadia

 * The Ebon Praetor</c> was the avatar of the deity worshiped by the Ebon Hand.
 * The Hand of Justice</c> was the avatar of the deity worshiped by the Order of Leitbur in Icatia.

Terisiare

 * Evra is an avatar born from the destruction of Halcyon.
 * The Keeper of Tresserhorn</c> was an avatar Lim-Dûl used to rule Tresserhorn in his stead.
 * Multani is the maro-sorcerer of the forest of Yavimaya.
 * Marit Lage, a powerful otherworldly being (not native to Dominaria), was imprisoned in the Dark Depths</c> during the Ice Age.

Urborg

 * Muldrotha
 * Torgaar

Ixalan

 * Gishath is an avatar of the Threefold Sun.
 * The local sun is embodied by various dinosaurian avatars that represent its stages: the Wakening Sun's Avatar</c>, representing the dawn and creation; the Verdant Sun's Avatar</c>, representing midday and life's sustenance; and the Burning Sun's Avatar</c>, representing sunset and death.

Mirrodin
Kaldra was an avatar created by the unification of the Kaldra artifacts. When Glissa Sunseeker assembled these artifacts to dispatch Memnarch, he took control of the avatar and turned it against the elf.

Ravnica

 * The Avatar of Discord</c> is an aspect of Rakdos's power which had gained a life of its own.
 * The Sanguine Praetor</c> is the avatar of one of Ravnica's various old gods whose worship predated the Ten Guilds.
 * The Scion of the Wild</c> is the avatar of the beings gone extinct due to the massive urbanization of Ravnica.
 * Stalking Vengeance</c> is the avatar of retribution composed of the souls of those who were violently slain.
 * The Primordials: five different types of powerful avatar, with one assigned to each color. The primordials were Luminate Primordial</c>, Diluvian Primordial</c>, Sepulchral Primordial</c>, Molten Primordial</c>, and Sylvan Primordial</c>.
 * During the War of the Spark, Niv-Mizzet was reborn as the Living Guildpact and is now designated as a dragon avatar. The Firemind played a critical role in the defeat of Nicol Bolas.

Serra's Realm
Serra often used an avatar of herself to conduct business all across her plane.

Shadowmoor
In the Seer's Parables, the origin of the world of Shadowmoor and various aspects of the world are attributed to the powerful Spirit Avatars to be found throughout the plane's history.

Ulgrotha

 * The Autumn Willow was the spirit of the forests of Ulgrotha and opposed Baron Sengir's pressing conquest.

Tarkir

 * The <c>Living Lore</c> embodies the Ojutai clan's knowledge and wisdom, becoming more powerful based on the spells that the clan used.
 * <c>Avatar of the Resolute</c> exemplifies the ideals of the Dromoka: strength, unity, and honor. This avatar's power and size vary depending on the power of its allies, further emphasizing those ideals.

Zendikar
Dangerous Avatars known as <c>Death's Shadow</c>s can be found on this plane, although some consider them more like demons. They grant enormous power to the weak and damaged ones by putting them in a near-death state, but they are uninterested in people with high vital strength.

Unknown Plane

 * Arahbo
 * <c>Hogaak, Arisen Necropolis</c>.

Multiverse

 * The Ur-Dragon

Avatars of the Planes
The Planes of Existence have their own Avatars themselves. Currently, there are six known Avatars.
 * <c>Soul of Innistrad</c>
 * <c>Soul of New Phyrexia</c>
 * <c>Soul of Ravnica</c>
 * <c>Soul of Shandalar</c>
 * <c>Soul of Theros</c>
 * <c>Soul of Zendikar</c>