Thicken mana spell

[Valoril]

I wanted to get this spell in order to continue my tailoring and to do Wu's armor .
I know that in 99 this spell was only available in the Brownie camp .
But I (like everybody ?) am KOS there .
Alakazam's is extremely confusing , contradictory and probably refers to later patches - go wolf form , go elemental illusion , don't go elemental illusion , hide , feign death , go tree illusion , stand on the head and whistle ...
While there definitely is a way to get this spell (Wu's armor is being sold in EC) , I have asked sofar around 30 + enchanters and none was able to tell me HOW to get this spell .
What was maddening was that the very few enchanters who actually had the spell , ALL without exception told me that they "were given it by somebody" !

So there must exist this mysterious "somebody" who knows how to get it , appears out of the thin air and hands it out to random enchanters and I am looking for him .
Would "somebody" here know what is exactly to be done to get this spell ?
Preferably a variant not involving 20 hours of some obscure quest raising the brownie faction .