Becoming the Advanced Swordmaster is essential on Arrakis — many foes use Holtzman shields that only blades can pierce, so deeper sword training is worth pursuing.
Find the advanced trainer in Harko Village: take an ornithopter to Harko, then go to the back alley behind the Choam Exchange and look for a blind man with a bandage over his eyes (this is Seron). Interact with him to accept...
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