Skulls scouts were one of the invaders during the Port Sarim Invasion. They work for The Iron Link, and are attempting to bring prisoners and locals back to the ship so they can be used as slaves. They usually attack Port Sarim guards.
Their power scales with player's level.
Killing them awards players with 5-9 tokens and sometimes a conch shell. The token reward can be boosted to 6-10 with the conch shell.
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