Is there any of the substance left after Shattering and death of Makuta?
Most of the subtance was Destoyed during shattering. Order of mata nui destroyed most of the pools of the substance.
Is there any more? wikipedia says cordex and redd star needed them to stabilise the powersources. are there any toa could still use or villains?
This makes it seems like there is some left:
Plus, I don’t think the Order of Mata Nui would have had time to destroy the Energized Protodermis used to make the Golden Skinned Being. That sample is probably still around, at least.
Oh Yeah, that totally exists unless the fall of makuta damaged the cave it was in.
I wonder how agori will react if they find out MU inhabitants have the subtance. Will they covet it or detest Matoran for bringing that evil subtance back.
Not on Spherus Magna, there isn’t.
For future reference, don’t use Wikipedia for Bionicle information. Use BS01.
I did use BS01 I used the word wikipedia out of force of habbit. 
Remnants in the MU, bunch on the Red Star and most of it frozen in space orbiting Spherus Magna.