Talk:Focus 2.0/@comment-2620:0:1A50:8054:A013:DD29:7360:EBF8-20171024153024/@comment-27328590-20171025021310

No, there's no mastery rank requirement, AFAIK. The number 16 denotes the pool cost - i.e., every unbound power costs 16 pool points to activate. Those points are taken from the pool of your active School, not the one where the unbound power originate from.