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: (White & Rookie/Champion/Ultimate/Mega)" ◆When you Summon/Advent a target Spirit, 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, you can send three cards from your decktop to the trash. For each target card among them, put one core from the void onto this Nexus.
Grand Skill: 2 [LV1][LV2] Flash - (Send two cores from this nexus to the Void) During this turn, give one Spirit you control +3000 BP. Then, if that Spirit has at least 10000 BP, once per turn per Spirit, refresh it.
Grand Field [LV2] When one of your "MegaGargomon"-named Spirit would leave the field due to the opponent, by putting three core from this Nexus to that Spirit, it remains on the field, refreshed.