Unless I'm completely unaware of some method, given that the only place Aberrant Spectres exist in Kandarin is in the Stronghold Slayer Cave, and the fact that you cannot attack anything in the cave that you don't have as a slayer task, it is not possible whatsoever to complete this League task, because you cannot be assigned Aberrant Spectres as a Slayer task no matter what region you unlock. Is this an oversight or am I just missing something here?
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