Rule 383.2.c.1

If a Game Object has a Triggered Ability that is active in a specific zone, it is evaluated and subsequently triggered if it enters that zone at the same time that its Trigger’s condition is met. Example: Immortal Phoenix says “When you kill a unit with a spell, you may pay [1][C] to play me from your trash.” This ability triggers if Immortal Phoenix is in your trash immediately after you kill a unit with a spell, even if the unit you killed with a spell was that Immortal Phoenix.