Passive skills

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  UndeadTakes 10% increased damage from attacks that are effective against Undead. HP Recovery +10% Received P. Crit. Rate -5% Received P. Crit. Damage -5% Received M. Crit. Damage -5% Vampiric Rage effect +1% Skills Vampiric effect +3% Resistance to Bleed +20% Resistance to Holy -10%
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  GrumpyStrikes without warning.
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  HP Increase (3x)Max HP +200% PvE Defence +3.5%.
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  Slightly Strong P. Atk.P. Atk. +15%.
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  Slightly Weak P. Def.P. Def. -10%.
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  Slightly Weak M. Def.M. Def. -10%.
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  Holy VulnerabilityVulnerable to Divinity attack.
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  Dark AttackUnleashes a dark attack.
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  Critical DamageDeals significant P. Atk. Critical Damage.
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  Reagent CarrierThe flesh of this monster is steeped in alchemical matter - a source of raw reagents.

Where it stands

6 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.