How do i activate "current internal skill" slot for mental skill bonding?23

1.103203552251386370655 » Sun Dec 18, 2016 10:36 am

Does 3rd slot under "current internal skills" in the mental skill bonding area unlock at anytme for use? Im level 67 wudang
Power: over 435k
Already have 2 mental skills bonded now.

Thank you.

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