Aura

Aura is an enchantment type that has the text "enchant [object or player]", generally with restrictions on what object can be enchanted, especially its type. 
==Description==
Auras are unique among evergreen permanents as being the only type that requires a target to cast and resolve (like instants and sorceries do), shared only with the unusual mechanic Mutate. Aura mechanics have been in the game from the start, but were formerly known as "local enchantments" or "enchant [type]" cards. The name was introduced in Ninth Edition.
===Usage===
Auras have many uses on many types, bestowing continuous effects, setting up triggers, or bringing their own activated abilities. Some Auras, like <c>Pacifism</c>, can be considered removal spells in disguise. Other Auras enhance the creature they're enchanting.
Putting an Aura on a permanent, especially a creature, opens the player up to a 1-for-2 exchange. One removal spell could destroy two cards: the creature and, indirectly, the Aura on it. A bounce spell can also put the Aura into the graveyard, making it "fall off", costing both the Aura spell and the mana spent on both cards. This makes the use of Auras a significant risk when used as an aggressive card. Many of these risks also apply when using Auras as removal: the creature is left on the battlefield, with some abilities still active, ripe for sacrificing, or for other costs like crewing Vehicles. White and Blue are the colors most inclined to use Auras as removal effects.
===Targets===
Auras have named the following targets
==Rules==
==Aura tokens==
;Test cards
==References==