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>Mega Xerneas ability is Life Aura, which works like Fairy Aura but also makes it so two-turn moves are done in one turn but only once per move
>Mega Yveltal ability is Death Aura, which works like Dark Aura but also makes life-draining moves restore more health
>Aura Break (which is Mega Zygarde's ability) reverses Fairy, Life, Dark and Death auras