Reading through the defeat and death of Skolas in Grimoire cards, it states that Variks wears a mask and that he would trade his docking caps over and over, and he mentions about being weak and never being strong like guardians or Kell.
Is Variks a Dreg and not a Vandal? So he dresses up like a Vandal for... reasons?
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All vandals were once dregs. Remember fallen can regrow their limbs.