Large Elemental (air)
Hit Dice: 8d8+16, hp 52
Massive Damage Threshold: -
Initiative: +8
Speed: 30 ft., fly 30 ft. (perfect)
Defense: 17, touch 13, flat-footed 13 (-1 size, +4 Dex, +4 natural)
Base Attack/Grapple: +6/+14
Attack: +10 melee (1d8+6, slam)
Full Attack: +10/+5 melee (1d8+6, slam), or +9 ranged
Fighting Space/Reach: 10 ft. by 10 ft./10 ft.
Special Qualities: Elemental, natural invisibility, improved tracking, darkvision 60 ft.
Saves: Fort +4, Ref +10, Will +4
Action Points: 0
Reputation: +0
Allegiances: none or master
Abilities: Str 18, Dex 19, Con 14, Int 14, Wis 15, Cha 11
Skills: Listen +11, Move Silently +15, Search +11, Spot +13
Feats: Combat Reflexes, Improved Initiative, Weapon Focus (slam)
Possessions: None
Challenge Rating: 7
Advancement: 9-16 HD (Huge)

Invisible stalkers have the following traits.

Elemental (Air): Invisible stalkers have the traits and immunities common to elementals.

Natural Invisibility (Su): An invisible stalker remains invisible even when attacking. Creatures that correctly discern the stalker\'s location despite being unable to see it have a 50% miss chance on melee and ranged attacks.

Improved Tracking (Ex): Invisible stalkers are consummate trackers and make Spot checks instead of Survival checks to track a creature\'s passage.

Automatic Language: Invisible stalkers speak (but neither read nor write) Auran. They understand (but do not speak, read, or write) two other languages.