[Summon Condition: Controlling at least one Astral Dragon Spirit]
[LV3][LV4][LV5] (When Attacks) Destroy an opposing 10000 BP or less Spirit. When you destroy a Spirit through this effect, put one core from the Void to your Red-only Grandwalker Nexus.
Ultimate-Trigger [LV4][LV5] (When Attacks) When Ultimate-Trigger hits, add one Red Symbol to this Ultimate. (Ultimate-Trigger: Put 1 card from your opponents deck to the trash. If the cost of that card is lower than this ultimate, it will hit)