Forvalaka

Climate: Any temperate or tropical
Hit Dice: 13d8 + 100 hit points
Intelligence: Very (11-12)
Size: Medium
Alignment: Chaotic Evil
No Appearing: 1
Armor Class: -2 (-5 vs. missile weapons)
Thac0: 9
Treasure: 10xJ, 10xK, 5xM, Q, V (in lair)

Movement: Movement: 36" ground (so fast they're hard to track visually, accounting for the lowered missile AC) 18" climbing
Attacks: 3 (bite, claw, claw)
Damage: 1d20, 1d20, 1d12

Special Abilities:

• Can disengage with one opponent and move to another without being subject to a parting attack by the first opponent.
  
• Save vs. paralyzation to attack the first round it attacks a character if initiative is lost (shock value)
  
• 70% immunity to mind-affecting spells
  
• -5 to surprise rolls
  
• Regeneration 280d4 days after killed if body not destroyed completely
  

The forvalaka is a sort of undead were-leopard. It may appear as a human, but changes to leopard form for any combat. It has no society; it is not a normal creature. Variant of lycanthrope, not contagious. No normal habitat, usually is following its last killer. Possibly created from a wereleopard by an evil mage of high level, long ago.

Lives in graveyards if not following targets. Digs up and eats new dead (though it cannot starve - it just gets cranky), lives in crypts. Immortal without extraordinary measures taken after killing it. Complete destruction of the body is necessary - consumption or magical burning.

In combat, the forvalaka jumps nearly at random from target to target. Swarms its target, makes one to four rounds of attacks, and jumps to another target.