Effect
Activate this card by targeting 1 monster you control; banish that target face-up. When an opponent's monster declares a direct attack: You can send this face-up card on the field to the Graveyard. If this card is sent to the Graveyard: You can Special Summon the monster banished by this card's effect.
"When this card is activated, target 1 monster you control and banish it face-up" is the effect processing when "Dimension Gate" is activated. (It cannot be activated during the Damage Step.)
When activating "Dimension Gate," you must target 1 monster in your Monster Zone.
"When an opponent's monster declares a direct attack: You can send this face-up card to the Graveyard" is an effect that starts a Chain Link. (It does not target.)
The effect "You can send this face-up card to the Graveyard" is an optional effect that can be activated once when an opponent's monster declares a direct attack.
"If this card is sent to the Graveyard: You can Special Summon the monster banished by this card's effect" is an effect that activates in the Graveyard and starts a Chain Link. (It does not target. It can also be activated during the Damage Step.)
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