This stocky, greenish-brown humanoid is a cross between an insect and reptile, with four arms, scaly skin, and fanged mandibles.
AC 21, touch 14, flat-footed 17 (+4 Dex, +5 natural, +2 shield)
Speed 40 ft.
Str 17, Dex 18, Con 14, Int 14, Wis 12, Cha 11
Environment any (Ethereal Plane)
Multiweapon Mastery (Ex) A predatory xill never takes penalties to an attack roll when fighting with multiple weapons, and treats claws as primary attacks even when also wielding weapons.
Planewalk (Su) A predatory xill can shift from the Ethereal Plane to the Material Plane as a move action. Shifting from the Material Plane to the Ethereal Plane takes 2 consecutive full-round actions, during which time the xill is immobile. As a xill fades away, it becomes harder to hit: opponents have a 20% miss chance in the first round and a 50% miss chance in the second. A xill can take a single willing or helpless creature with it when it switches planes.
Walk Unseen (Su) Once per day per three Hit Dice it possesses, as part of shifting from the Ethereal Plane to the Material Plane with its planewalk ability, a predatory xill may choose to gain the benefits of greater invisibility, as per the spell (CL 10th).