[LV1][LV2][LV3] (When Summoned) Destroy an opposing Spirit/Ultimate with 20000 BP or less. The cores on the Spirit/Ultimate destroyed by this effect are sent to the Trash, not the Reserve.
[LV2][LV3] (When Attacks) By sending two core from your Red Grandwalker Nexus to the Void, during the next (Opponent's Refresh Step), no core returns to the Reserve.