Can i do new perm into a new world
example:
my default world is faction
and i want new perm for skyblock
how i would do that

I'm assuming you're using PEX 1.x and not PEX 2.x when you ask.

/pex group <group> add permission.node [world]

/pex group Guest add modifyworld.* Faction

The wiki page has all of the PEX Commands for PEX 1.x versions.

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