This Nexus can only be affected by effects that specify "Grandwalker Nexus". Core can only be placed on this Nexus through the effect of "Core Charge" or effects that specify "Grandwalker Nexus", also, core on this Nexus can not be moved except by effects that specify "Grandwalker Nexus".
Core Charge: ("Astral Dragon" / "Astral Soul" / "Astral Deity" / "Galaxian" / "Worldswalker" & Cost 3 or higher) or (Brave)
When you summon/advent the listed Spirit/Brave, put one core from the void onto this Nexus. When this Nexus is deployed, if you do not control a Nexus with the same card name as this card, send the top three cards of your deck to the trash. For each target Spirit/Brave that was sent to trash, place one core from the void onto this Nexus.
Grand Skill: 2 [LV1][LV2] Flash - (Send two core from this nexus to the void) Destroy 1 opposing Spirit with 4000BP or less. Alternatively, destroy 1 opposing Nexus.
Grand Field [LV2] (Your Attack Step) At the end of your Braved Spirit battle, send 1 core from your opponent's Life to the Reserve.