SRD:Epic Expanded Knowledge
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Epic Expanded Knowledge [Epic][Psionic]
You learn another power.
You learn one additional power at any level up to the highest level of power you can manifest. You can choose any power, even one that is part of another discipline’s list or another class’s list.
You can gain this feat multiple times. Each time, you learn one new power at any level up to the highest level of power you can manifest.