# All hit die become D12.
# +4 Strength, -4 Constitution
# Darkvision 60 ft.
# 1 Extra feat (only if its half human)
# +4 Bonus on saves against all mind-affecting effects.
# Immune to fear and morale effects (positive or negative).
# +4 Bonus on saves against poison, sleep, paralysis, stunning, disease, and Death effects.
# Great Fortitude Feat for free
# 25% chance to ignore a critical hit or sneak attack damage
# Immune to death from massive damage.
# Unaffected by raise dead and reincarnate spells or abilities. Resurrection can remove this template, turning them back into the base creature.
# Immune to both Cure and Inflict Spells. Both of these are bitter-sweet flashes of pain that heals/damages an equal amount and therefore has no mechanical effect.
# Spells that deal damage only to undead deal half damage to half-undead. Spells that deal double damage to undead deal 50% more damage to half-undead than to a normal creature.
# Half-undead with intelligence scores greater than 2 gain fast healing equal to 1 per 4 hit dice, to a maximum of 5 at 20 HD.
# Half-undead only need to eat, sleep, and breath half as much as a normal being of similar size.
# When a half-undead dies it reanimates as a mindless zombie or skeleton in 1d6 days. After this point only a true resurrection spell can bring back such a creature.