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: ("Ogre Wizard"/"Worldswalker"/"Avatar" & Cost 3 or higher)"
◆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, send the top three cards of your deck to the trash. For each target card among them, place one core from the void onto this Nexus.
[LV1][LV2] This Nexus' symbol is also treated as Purple.
Grand Skill: 4 [LV1][LV2] Flash (Either Attack Step) - (Send four core from this nexus to the void) Draw one card. Then, discard one "Ogre Wizard" family Spirit card from your Hand, and activate one of its (When Summoned) effects as this Nexus' Colorless Grand Skill.
Grand Field [LV2] (Your End Step) The opponent discards one card from their hand.
Ruling:
1. You do not have to discard a card by this Nexus' Grand Skill.
2. When this Nexus' Grand Skill activates a (When Summoned) effect, and the (When Summoned) effect targets at the original Spirit, treat it as no target.