Steps to reproduce: Dragonborn, Dragon Breath power, either Sorceror + Ancient Soul, or any arcane class, Draconic Spellcasting, and Ninefold Master paragon path. This adds the Arcane keyword to the Dragon Breath power. When selecting Arcane Admixture, Dragon Breath does not show up as an available power to admix, because Admixture is looking at Category, not keyword:
Steps to reproduce: Dragonborn, Dragon Breath power, either Sorceror + Ancient Soul, or any arcane class, Draconic Spellcasting, and Ninefold Master paragon path. This adds the Arcane keyword to the Dragon Breath power. When selecting Arcane Admixture, Dragon Breath does not show up as an available power to admix, because Admixture is looking at Category, not keyword:
Need to investigate whether Ancient Soul or Breath Expertise PP feature can add Category as well as keyword.