From TibiaWiki

Undead Creatures are neither dead nor alive. Some of them were certainly normal men and women at one time, but they have long since died, and in many cases, they walk through Tibia as mindless monsters, terrorizing adventurers and killing anyone who approaches them. The regular corpse isn't indirectly turned into an undead. Those who are turned into undead were probably manipulated by a deity to become a soldier in an endless war against the living.

Usually a deceased person to become an undeath had to become a student of Urgith. Regular persons who are not acquainted with the arcane arts of the necromancy are usually guided by Toth, the Warden of Souls to their eternal rest.

Because these creatures are not alive, they are not affected by Life Drain, and usually Poison does not bother then at all.

Since very few creatures are able to make themselves "undead", most undead creatures have been converted or conjured by Necromancers.

The largest group of undead creatures can be found in Drefia, where the Necromant King has fled to refuge when he has backstabbed an ancient order and created an unholy brotherhood. Because of their involvement in the plot against the Pharaoh of Ankrahmun, many undead creatures were banished to the sealed tombs under sand in the Kha'labal.

Undead Humanoids

Creature		Exp	HP	Summon	Convince	Loot
Bane of Light		450	~925	--	--	Unknown.
Banshee		900	1000	--	--	0-100 gp, Candlestick, Simple Dress, Dirty Cape, Silver Amulet, Mirror, Petrified Scream (semi-rare), Black Pearl (semi-rare), Poison Dagger (rare), Silver Brooch (rare), Stone Skin Amulet (rare), Lyre (rare), Spellbook (rare), Strong Mana Potion (rare), Ring of Healing (rare), Blue Robe (rare), White Pearl (very rare), Terra Mantle (very rare), Wedding Ring (very rare), Life Crystal (very rare), Red Robe (very rare).
Blightwalker		5850	8900	--	--	0-150 gp, 0-3 Platinum Coins, 0-3 Bunches of Wheat, 0-9 Poison Arrows,Blank Rune, Demonic Essence, Seeds, Soul Orb, Golden Sickle, Scythe, Rusty Armor (Rare), Hailstorm Rod (semi-rare), Gold Ring (rare), Terra Legs (rare), Terra Mantle (rare), Garlic Necklace (very rare), Amulet of Loss (very rare), Death Ring (very rare), Gold Ingot (very rare), Skull Staff (very rare), Bundle of Cursed Straw, Great Health Potion.
Crypt Shambler		195	330	--	580	0-55 gp, 0-10 Worms, Half-Digested Piece of Meat, Bone, Rotten Meat, Iron Helmet (rare), 0-3 Throwing Stars (rare), Bone Shield (rare), Two Handed Sword (rare), 0-2 Small Diamonds (rare), Bone Sword (rare).
Duskbringer		2600	~3000	--	--	Midnight Shard.
Ghoul		85	100	450	450	0-30 gp, 0-6 Worms, Rotten Piece of Cloth, Torch,Viking Helmet, Knife, 0-2 Skulls (semi-rare), Scale Armor (semi-rare), Brown Piece of Cloth (semi-rare), Life Ring (very rare).
Grim Reaper		5500	3900	--	--	0-245? gp, 0-4 Platinum Coin, 0-4 Orichalcum Pearls, Concentrated Demonic Blood, Scythe, Ultimate Health Potion, Demonic Essence, Mystical Hourglass, Great Mana Potion, Magic Light Wand, Dark Shield (semi-rare), Rusty Armor (Rare) (semi-rare), Glacier Kilt (very rare), Underworld Rod (rare), Skullcracker Armor (very rare), Nightmare Blade (very rare), Death Ring (very rare), Black Hood (very rare).
Lich		900	880	--	--	0-120 gp, Staff, Spellbook, Black Pearl, White Pearl, Dirty Cape, Strange Helmet, Mind Stone, Strong Mana Potion (semi-rare), Platinum Amulet (very rare), Ring of Healing (rare), Lightning Boots (rare), Blue Robe (very rare), Castle Shield (very rare).
Mummy		150	240	--	--	0-91 gp, 0-3 worms, Bag, Short Sword, Magic Light Wand, Strange Talisman, Silver Brooch, Poison Dagger, Gauze Bandage, Crystal Ring (semi-rare), Black Pearl (semi-rare), Silver Amulet (rare), Yellow Piece of Cloth (rare), Black Shield (very rare), Mini Mummy (very rare).
Rift Scythe		2000	3600	--	--	Nothing.
Undead Jester		5	355	--	--	Fish, Bar of Chocolate, Spellwand, Supersoft Pillow, Suspicious Surprise Bag, Red Piece of Cloth, Yellow Piece of Cloth, White Piece of Cloth, Green Piece of Cloth, Blue Piece of Cloth, Brown Piece of Cloth, The Head of a Jester Doll, Part of a Jester Doll (Right Leg), Part of a Jester Doll (Left Leg), Part of a Jester Doll (Right Arm), Part of a Jester Doll (Left Arm), The Torso of a Jester Doll, Piggy Bank, Toy Mouse, Green Perch, Rainbow Trout, Marlin, Ice Cream Cone (Blue-Barian).
Undead Prospector		85	100	440	?	0-30 gp, 0-6 Worms, Scale Armor, Viking Helmet, Brass Helmet, Torch, Knife, Brown Piece of Cloth (rare).
Vampire		305	475	--	--	0-20 gp, Bag, Leather Legs, Bowl, Skull, Grave Flower, Katana, Bronze Amulet, Strong Health Potion (semi rare), Black Pearl (semi rare), Vampire Teeth (semi-rare), Strange Helmet (rare), Spike Sword (rare), Ice Rapier (rare), Emerald Bangle (rare), Vampire Shield (very rare).
Vampire Bride		1050	1200	--	--	0-130 gp, 0-? Platinum Coin, Vampire Teeth, Strong Mana Potion, Strong Health Potion (semi-rare), Moonlight Rod (rare), 0-2 Small Diamond (rare), Emerald Bangle (rare), Hibiscus Dress (rare), Rusty Armor (Semi-Rare) (rare), Velvet Tapestry (rare), Flower Bouquet (rare), Mysterious Voodoo Skull (very rare), Boots of Haste (very rare), Blood Goblet (very rare).
Zombie		280	500	--	--	0-64 gp, Mace, Torch, Brass Helmet, Halberd, Rotten Meat, Steel Helmet, Battle Hammer, Rusty Armor (Common), Half-Eaten Brain (semi-rare?), Mana Potion (rare), Simple Dress (rare), Life Ring (rare)

Undead Humanoid Bosses

Creature		Exp	HP	Summon	Convince	Loot
Arachir the Ancient One		1800	1600~	--	--	0-98? gps, 0-5 Platinum Coins, 0-1? Black Pearls, Skull, Strong Health Potion, Ring of Healing, Vampire Shield, Bloody Edge (rare), Vampire Lord Token (always).
Armenius (Creature)		?	?	--	--	0-23 gp, Vampire Lord Token , Vampire Shield.
Arthei		4000	4200~	---	--	18-80gp?, Ring of Healing, Vampire Shield, Dreaded Cleaver
Boreth		1800	1400	---	--	0-100 gp, 0-5 Platinum Coin, Strong Health Potion, Black Pearl (semi-rare), Ring of Healing (semi-rare), Vampire Shield (rare), Hibiscus Dress (rare), Dreaded Cleaver (very rare)
Diblis the Fair		1800	1500~	--	--	0-99 gp, 0-5 Platinum Coin, Skull, Black Pearl (semi-rare), Ring of Healing (semi-rare), Strong Health Potion (semi-rare), Vampire Shield (rare), Spellbook of Lost Souls (very rare), Vampire Lord Token (always).
Gravelord Oshuran		2400	3100	--	--	0-97 gp, Strong Mana Potion, White Pearl, Black Pearl, Ring of Healing, Blue Robe, Lightning Boots, Spellscroll of Prophecies, Spellbook.
Koshei the Deathless		0	1200-2000	--	--	None.
Lersatio		2500	1600~	--	--	0-5 Platinum Coin, 0-82+ Gold, Strong Health Potion, Ring of healing (semi-rare), Vampire Shield (rare), Dreaded Cleaver (rare).
Marziel		3000	1900~	---	--	0-7 Platinum Coins, 0-100 gp, Strong Health Potion, Ring of Healing, Vampire Shield (rare), Dreaded Cleaver (very rare).
Shadow of Boreth		?	?	--	--	Unknown.
Shadow of Lersatio		?	?	--	--	Unknown.
Shadow of Marziel		?	?	--	--	Unknown.
Sir Valorcrest		1800	1600~	--	--	0-93 gp, 0-5 Platinum Coins, Vampire Lord Token (always), Skull, Sword Ring, Ring of Healing, Strong Health Potion, Vampire Shield (rare), Chaos Mace (very rare).
The Count		450	1250	--	--	0-? gp, 0-1? Skull, The Ring of the Count (always), War Hammer, Vampire Shield.
The Weakened Count		450	740	--	--	0-92 gp, Skull (Item), Vampire Shield (very rare), The Ring of the Count (always).
Zevelon Duskbringer		1800	1400	--	--	0-75 gp, 0-5 Platinum Coin, Black Pearl, Strong Health Potion, Ring of Healing, Vampire Shield (very rare), Vampire Lord Token (always).

Undead Humanoid Arena Boss

Creature		Exp	HP	Summon	Convince	Loot
Cursed Gladiator		215	435	--	--	Nothing. It turns into ashes that vanishes quickly afterwards.

Creature Types of Tibia Amphibians Frogs Quara Arthropods Arachnids Insects Crustaceans Demons Demon Lords The Ruthless Seven Demons Triangle of Terror Elementals Bio- Geo- Cryo- Hydro- Electro- Pyro- Elemental Lords Blobs Humans Amazons Outlaws Barbarians Pirates Monks Sorcerers Necromancers Voodoo Cultists Humanoids Dwarves Goblins Elves Orcs Giants Trolls Hybrids Chakoyas Minotaurs Dworcs Misc Magical Creatures Beholders Shapeshifters Djinn Mammals Apes Felines Artiodactyls Glires Bears Misc Canines Mutated Mammals Elephants Misc Annelids Bosses Arena Bosses Event Creatures Birds Traps Reptiles Dragons Misc Lizards Serpents The Undead Ghosts Skeletons Pharaohs Undead Humanoids