When this card was either revealed by the effect of your "Godseeker Thunder-Z-Weasel" or sent to the Trash by the effect of your "The Grandwalker Zeus," you can add it to your hand. When you've done so, put one core from the Void to a Grandwalker Nexus you control.
Flash - Destroy any opposing Spirits/Ultimates up to a total of 15000 BP. Also, by putting one core from your "The Grandwalker Zeus" to the Void, during this Turn, opposing effects can't end the Attack Step.