Passive skills

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  Unique MonsterA unique creature of immense power. It cannot be defeated alone.
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  DemonsTakes 10% increased damage from attacks that are effective against Demons. M. Atk. +10% Atk. Spd. +5% Vampiric Rage effect +1% Skills Vampiric effect +2% Resistance to Dark +10% P. Def. -5% Resistance to Holy -10% Resistance to Blunt -10% Resistance to Dual Blunt -10%
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  Lethal ImmunityNot today.
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  Bleed ResistanceResistant to Bleed.
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  Mental Attack ResistanceProvides resistance against mental attack.
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  Hold ResistanceResistant to Hold.
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  Paralyze ResistanceResistant to paralyzing attacks.
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  Stun Attack ResistanceResistant to Stun.
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  Sleep ResistanceResistant to Sleep.
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  Vampiric Rage ResistanceReduces Vampiric Rage effects received by this creature by 50%.
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  Reagent CarrierThe flesh of this monster is steeped in alchemical matter - a source of raw reagents.

Where it stands

1 spawn points from the wiki.

What it costs and whether farming it pays — in the service: prices are read from the live order book, separately for every server.