AURA
Aura is a subtype that appears on an enchantment that can be attached to a permanent. Each Aura has the keyword “enchant” followed by what it can be attached to—for example, “enchant creature,” “enchant land,” and so on. When you cast an Aura spell, you choose its target. When the Aura resolves, it’s put onto the battlefield attached to that permanent. The Aura stays there until it’s destroyed or until the permanent it’s attached to leaves the battlefield. If the permanent leaves the battlefield, the Aura card is put into your graveyard.
Example card: Pacifism