Notes
The Nightstalker is a little bit stronger than a Necromancer.
Abilities
Melee (0-90) poisons you starting from 4hp, Holy Life Drain (60-170), Invisible, Haste, Paralyze (looks like sleep), Creature Illusion: changes its appearance to Werewolf, Vampire Lord, Grim Reaper, Tarantula or Ferumbras (rare).
Damage Taken From Elements
Location
Strategy
All vocations: Remember to bring a garlic necklace when hunting these, as it blocks a considerable amount of damage from their strongest attack and it is also inexpensive. If you plan to hunt for long bring about one necklace per each hour you plan hunting (they last longer than one would think). Don't let him get closer or he will use his strong life drain attack on you.
Knights should use full attack and kill them as fast as possible. Killing them before they get the chance to use their life drain attack can save you any means of healing at all, as their melee will often be weak. The many chances of getting rare items and high gold drop mean this monster can be hunted without a huge waste at lvl 60+.
Loot
0-108 gp, Shadow Herb, Crystal Ring (semi-rare), Protection Amulet (semi-rare), Platinum Amulet (rare), Strong Mana Potion (rare), Spirit Cloak (rare), Crystal of Balance (very rare), Haunted Blade (very rare), Chaos Mace (very rare), Boots of Haste (very rare).