Dark Lucius is a series of 3 EARTH Fiend "LV" monsters released in Cyberdark Impact. They can negate the effects of monsters that are defeated by them, similar to the effect of "Wicked-Breaking Flamberge - Baou". The trump card of this series is "Dark Lucius LV8", which can even banish the defeated monsters if it was Summoned through the effect of "Dark Lucius LV6".
- The negating effect of "Dark Lucius" is a weakened version of "Dark Ruler Ha Des".
- It was said that "Dark Lucius" is a "Falling Down" version of "Warrior Dai Grepher". After the transformation, he battled his archenemy, "D.D. Warrior Lady", in "Different Dimension Ground", and encountered "Grepher" in "Different Dimension Encounter".