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The narrative centerpiece of the show is the . Unlike the original Omnitrix, which focused on diversity of species, the Ultimatrix introduces the "Ultimate" evolution feature. By simulating a "worst-case scenario" combat environment for a million years, the device forces DNA to evolve for war. This serves as a powerful metaphor for the show's darker tone: power is no longer just about versatility; it is about survival and escalation. Key Narrative Arcs The series is defined by two major indices of conflict: index of ben 10 ultimate alien