When does an object's timestamp differ from the usual time it entered its zone?

In Magic: The Gathering, the timestamp of an object is critical as it determines the order in which effects are applied, especially when multiple objects or abilities interact with each other. Typically, an object receives its timestamp when it enters its current zone.

When an Aura or Equipment attaches to an object, this creates a new event that affects the object's timestamp. The Aura or Equipment effectively "interacts" with the object, and as a result, the Aura or Equipment itself gets a timestamp that is separate from the original object. This means the attached Aura or Equipment will have its own time of entry into play and this can affect how interactions with that object are resolved, especially if multiple effects come into play at the same time.

None of the other situations listed would cause the object's timestamp to differ from when it entered its zone. For instance, when an object is destroyed, it does not change the timestamp of that object; it simply goes to the graveyard and then may return with its original timestamp if brought back into play. Similarly, returning a card to a player's hand does not affect the timestamp of that object. Lastly, the concept of layers relates to how and when effects are applied, but it does not modify timestamps directly.

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