A player who has priority may play an enchantment card from his or her hand during a main phase of his or her turn when the stack is empty. Playing an enchantment as a spell uses the stack. (See rule 409, “Playing Spells and Activated Abilities.”)
When an enchantment spell resolves, its controller puts it into play under his or her control.
Enchantment subtypes are always a single word and are listed after a long dash: “Enchantment — Shrine.” Each word after the dash is a separate subtype. Enchantment subtypes are also called enchantment types. Enchantments may have multiple subtypes. (You can find the complete list of enchantment subtypes under “Enchantment Types” in the glossary at the end of this document.)
Some enchantments have the subtype “Aura.” An Aura comes into play attached to an object or player. What an Aura can be attached to is restricted by its enchant keyword ability (see rule 502.45, “Enchant”). Other effects can limit what a permanent can be enchanted by.
An Aura spell requires a target, which is restricted by its enchant ability.
If an Aura is enchanting an illegal object or player, the object it was attached to no longer exists, or the player it was attached to has left the game, the Aura is put into its owner’s graveyard. (This is a state-based effect. See rule 420.)