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Then how exactly do conditional CBP/CBN actually make the abilities work if a negate all is active before they're played? If cards are at face value, they can't be being "used" by anything at the time so how do they enter play and be able to activate? It has the potential to be CBN/CBP if used by a specific character, but you don't know who it's being used by until it's in play, which is after it is being negated.