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i did find stignix and finished the tree of realization quest. i didn't go for the answer thingy. what was that about? did i miss anything?


Nope, if I understood you correctly - you didn't miss anything by not asking the tree a question.
IMo money is the best option, a chest appears at once. Have to look it up this evening => 2500? 4000? 5000 gp?
The weapon is found in the imp hero's house (crossbow) anyway (shows up with ALT).
Armour => is in Act 3 anyway => a grave with a shadow armour.
Seeing Stone => was only a tip IMO
shut out lights and see in Act => either a joke? If it is dark you see... nothing? Or maybe a bug, not sure.