You can find it exactly north of the Barbarian Village and exactly south of Edgeville.
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South of Edgeville, if you haven't done the Stronghold of Player Safety yet, then go to the house near the crevice.
Look for troll related quests, they are bound to lead you to troll stronghold.
Complete level one
you can pick flax at lletya, gnome stronghold, or catherby flax field.
Level 27 minotaurs in stronghold, or level 28 hobgoblins.