--------------------
Special Abilities
--------------------
Alchemy +3 (Su) +2 to Craft (Alchemy) to create alchemical items, can ID potions by touch.
Armor Expert -1 Armor Check Penalty.
Canny Observer +4 vs. traps and eavesdropping
Ceaseless Observation (Ex) Use INT instead of CHA for Gather Unformation (+5)
Combat Expertise +/-1 Bonus to AC in exchange for an equal penalty to attack.
Darkvision (60 feet) You can see in the dark (black and white only).
Elf Blood Half-elves count as both elves and humans for any effect related to race.
Elven Immunities - Half Elf +2 Racial bonus on saving throws against enchantment spells and effects.
Elven Immunities - Sleep You are immune to magic sleep effects.
Half Drow Inspiration (+1d6, 4/day) (Ex) Use 1 point, +1d6 to trained skill or ability check. Use 2 points, to add to attack or save. The investigator can use inspiration on any Knowledge, Linguistics, or Spellcraft checks without expending a use of inspiration, provided he's trained in the skill.
Investigator Talent: Expanded Inspiration An investigator can use his inspiration ability when attempting Diplomacy, Heal, Perception, Profession, and Sense Motive checks without expending uses of inspiration, provided he’s trained in the skill.
Keen Recollection Can attempt all Knowledge checks untrained.
Light Blindness (Ex) Bright light blinds for 1 rd, then dazzled as long as remain in it.
Power Attack -1/+2 You can subtract from your attack roll to add to your damage.
Trap Sense (Ex) +1 bonus on reflex saves and AC against traps
Trapfinding +1 Gain a bonus to find or disable traps, including magical ones.