While "Nurikabe" is on your Field, treat all the reduction for this Magic card as filled.
Flash - During this turn, all opposing Spirits cannot attack. If (Soul Core) was used to pay the cost, instead, during this turn, all opposing Spirits/Ultimates cannot attack.
This card in your Trash returns to your Hand when you summon Nurikabe.
Flash - Banish this card and, during this turn, opposing Spirits/Ultimates can't attack. Also, if was used to pay the cost, during this turn, opposing Spirits/Ultimates can't refresh.