Undead Ground

Requirements

 * Must be level 80 or higher to enter.
 * You dont neeed a The Copy Ring of the Oath since the Update Soul & Sienna.
 * Dont have to go through a dungeon to enter since Porta Inferno update
 * Enterance, however is still located where the Shades and Ghosts are in Bloody Ice.

Warp Code
To receive the map-code and warp-code for this location, the following quest has to be completed:
 * Hidden Quests
 * The Frozen Tower of the Undead (Lv 85)

NPC's
No NPC's can be found in this area

Undead Ground Monsters

 * The location of the monsters are color coded, and the bosses are numbered.
 *  Lihorn Zombie  (level 91-93)
 * (1)  Bloody Lihorn Zombie  (Boss)
 *  Ghost Blader  (level 94-96)
 * (2)  Ghost Assassin  (Boss)
 *  Zombie Fighter  (level 98-100)
 * (3)  Zombie Warrior  (Boss) (level 108-110)
 *  Zombie Slater  (level 101-103)
 * (4)  Zombie Slayer  (Boss) (level 111-113)
 *  Zombie Knight  (level 105-107)
 * (5)  Zombie Prime Knight  (Boss)
 *  Berserk Ghoul  (level 108-110)
 * (6)  Furious Ghoul  (Boss)
 *  Vampire Servant  (level 112-114)
 * (7)  Vampire Steward  (Boss)
 *  Death Soldier  (level 115-117)
 * (8)  Death Sergeant  (Boss)
 *  Death Giant  (level 118-120)
 * (9)  Death Giant Captain  (Boss)
 *  Spector  (level 119-121)
 *  Wraith  (level 120-122)
 * (10)  Elder Spector  (Boss)

For more information (such as levels) on Undead Ground monsters, click here.

Dungeons

 * House of the Dead
 * Patren%2C_Patren/Exilian Volcano
 * Frozen Tower of the Dead (B1F)
 * Frozen Tower of the Dead (B2F)