When you summon an "Astral Dragon" Spirit, this card in your hand may be summoned as a Cost 4.
[LV1][LV2][LV3] (When Summoned) Destroy one opposing BP 20000 or less Ultimate.
[LV2][LV3] Flash - (Your Attack Step) By sending two cores from your The Grandwalker Apollon to Void, destroy one opposing BP 10000 or less Spirit/Ultimate.