Looks pretty smooth, although somewhat large. It really contains three separate creatures though and that stretches it out.
If I were running this creature as an npc I would get a little overwelmed.... I think.. because of the skill list and the spell/powers list. That is what used to happen to me in RQ when the Npc's were loaded with skills, spells, and items though. I always had to highlight or underline one to three spells that I was sure I was going to use and then kind of forget the rest. This was especially true if the Npc had friends. Maybe if you would leave a space between each catagory: skills, sorcery, bindings, etc. Unfortunately that would make the whole thing longer, but maybe easier for the GM to read and sort through when the dice are flying.
The P'Tek itself sounds very cool and unique. I absolutely love the general feel of the character as well as your names for things: umbrai, mana shard, Durghat. It makes your Chronicles campaign sound very interesting.
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294/420
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