I know it's been said at this point, but the CSM book is pretty clear on this to my eyes.
If the Psyker has a Mark of Chaos, or is a Daemon of a
particular Chaos God, 1they must roll at least one, 2and may
roll up to half, of their powers on the table that corresponds
to their patron deity.
1. if the psyker is ML1 and has the mark of a specific god, they must roll their one power on the corresponding psychic table (which of course gives them psychic focus since they generated all their powers from one table)
2. if the psyker is ML2+ and has the mark of a specific god, they can only generate half of their powers (I assume rounding up because that's the way of this game in a lot of other instances) from that specific table.
I can find no mention of this 'Chaos Focus' you guys bring up in the CSM 'dex. Based on what I read in the Codex, the only way a Chaos psyker can get psychic focus on a table is if they are ML1. What's all this about 'Chaos Focus'? Even in the Daemon book I can't find this sentence anywhere:
If a psyker has a mark of chaos or is a daemon of a particular chaos god, that model automatically knows the primaris power of the discipline that corresponds to their patron deity, in addition to any other powers it knows.
Where's it at??