Underkingdom Overlord
From Stormhalter
Required Experience / Skill Level - Difficulty Solo: Hardcore
Thaumaturge should be around 18/13 in a party setting. As low as 7 magic is needed in order to cast Death Spell
Wizard should be around 18/14 in a party setting. As low as 14 magic is needed in order to cast Ice Spear Spell
Weapon Skill: Generally one needs 13/14 Weapon skill in order to start blocking OL efficiently.
Location
Overlord can be found in Underkingdom deep beneath the undead area.