If this card was revealed by your White effect or sent to the trash, you may add it to your hand. If it is added from your Trash to your hand, put one core from the Void to your White-only Grandwalker Nexus.
Flash - When this battle ends, end the Attack Step. Also, when the Attack Step ends, by sending one core from your White-only Grandwalker Nexus to the Void, return an opposing Spirit to the hand.