Weapon and Armor Proficiency: A Halruaan magehound gains no proficiency with any weapon or armor.

Spells Per Day/Spells Known: At each level except 4th and 8th, a Halruaan magehound gains new spells per day (and spells known, if applicable) as if she had also gained a level in a spellcasting class to which she belonged before adding the prestige class level. She does not, however, gain any other benefit a character of that class would have gained (improved chance of turning or destroying undead, metamagic or item creation feats, and so on). If she had more than one spellcasting class before becoming a Halruaan magehound, she must decide to which class to add each level for the purpose of determining spells per day and spells known.

Improved Saves (Ex): The Halruaan magehound learns to improve her resistance to the very sorts of spells she uses against others. At 1st level, she gains a +1 resistance bonus on her saves against spells and spell-like abilities. This bonus increases by +1 every two levels above 1st, to a maximum of +5 at 9th level.

Arcane Sensitivity (Sp): The Halruaan magehound develops a keen awareness of the presence of arcane magic in any living creature. She can use arcane sensitivity (see page 44) at will as a wizard whose level is equal to her Halruaan magehound level plus her highest spellcaster level.

Spell Resistance (Ex): The Halruaan magehound develops resistance to magic. At 4th level, she gains a spell resistance equal to 15 + her Halruaan magehound level.

Antimagic Field (Sp): The Halruaan magehound develops a powerful tool to thwart the mages she is hunting. At 10th level, the magehound can use antimagic field once per day as a wizard whose level is equal to her Halruaan magehound level plus her highest spellcaster level.